The norm, in detail
The union inside the site, section by section
Ley 27.802, ss. 138, 141, 142 and 144 (Title XV)
in forceNATIONAL
Labor
Derives from: The comprehensive labor reform is now law
Assemblies need prior authorisation and are unpaid, ten hours for the shop steward, protection only for full representatives, and what breaching it costs: reinstatement with back pay, or the remaining term plus a year.
What changed and who it applies to
What changed
Four sections that look nothing alike and together redraw the day-to-day of union representation at a workplace. The assembly (new s. 20 bis of Ley 23.551): it may be convened "provided this does not affect the normal course of the company's activities or cause harm to third parties", and inside or outside the workplace the employer's prior authorisation is required "as to both the time and the duration" — and of the place too, if held inside; the text closes with two short sentences: to exercise the power "it must be up to date in the payment of wages" and "the worker shall not accrue wages for its duration". The shop steward (s. 44(c)): a credit of up to ten (10) paid hours per month, unless the collective agreement grants more, and "the exercise of this right may not cause the interruption of activities in the work area". Protection of the representative (s. 52): it applies "only to lawfully elected union delegates or representatives holding full positions" and to up to two full congress delegates in large companies and one in SMEs; "alternates shall not be covered by the union protection provided in this law". And the employer may ask the court, within five days, to suspend the work as an interim measure where the person's continued presence "could pose a potential danger to the safety of persons or company property or to its normal operation". ⭐ And the one that opens a new door (s. 29): trade-union status may be granted to a company union where, for six continuous months, it has more dues-paying members in that company than the association with pre-existing status, "whatever the degree or the material, territorial and personal scope of the latter". ⭐ And what was missing from that section 52, which is what puts a number on getting it wrong. If the employer breaches the guarantee, the affected person may sue by summary procedure for reinstatement in their post, plus the wages lost during the court proceedings, or for the restoration of working conditions; and if the court orders reinstatement and the employer does not comply, it may impose the coercive penalties of section 804 of the Civil and Commercial Code for as long as the union protection lasts. Or the steward may leave and collect. The text gives them the option to "consider the employment relationship terminated by virtue of the employer's decision, placing themselves in a position of constructive dismissal", in which case they receive, in addition to dismissal compensation, "a sum equivalent to the pay that would have corresponded to them for the remainder of the term and the year of post-term stability". For a candidate who was not elected the calculation differs: compensation, plus the pay for the protection period not yet run, plus one further year of pay, and those sums are not cumulative with those of section 245 bis of the Ley de Contrato de Trabajo. Two limitation rules: filing for reinstatement interrupts the limitation period for the claim for compensation and lost wages, and time only starts running once there is a final ruling. ⭐ And the way out the employer has without asking permission: it may release the protected representative from working, notifying the Ministry of Human Capital within 48 working hours and keeping up every payment and duty on its side; but it then has ten days, on pain of forfeiture, to go to court for a finding that the substantiated grounds of section 78 of the Ley de Contrato de Trabajo exist, or directly to seek exclusion from the guarantee. verif · Mar 6, 2026 ↗
In force
In force with the law, from 6 March 2026. All four sections are self-executing: they delegate no regulation and set no adaptation deadlines. ⏰ The only one that starts a clock of its own is the company union: trade-union status requires six continuous months of a majority of dues-paying members before the filing, so the earliest possible application runs from when that membership starts counting, not from the law. verif · Mar 6, 2026 ↗
Are you in or out?
To whoever runs a site office or a plant, which is where these four rules either apply or do not. Three of them are about making the working day predictable: an assembly can no longer land on a shift unannounced, the steward's hours have a number and cannot stop the area, and the list of people with reinforced protection becomes closed and countable — elected full representatives, plus two or one congress delegate depending on size — instead of open-ended. ⚠️ The fourth is of a different nature and should not be lumped in with them: a company union taking over trade-union status simplifies nobody's day, it changes the counterpart. It mainly reaches large projects with a stable in-house workforce, the only ones where a company-wide membership majority is attainable. It also reaches, on the other side, the alternate representative who until now believed themselves protected and no longer is, and anyone attending an assembly: those hours are not paid. ⭐ And what to have at hand before deciding: what getting it wrong costs. Dismissing or suspending a protected representative without the prior court ruling does not end in a fine: it ends in reinstatement with the wages for the whole case, or — if the steward chooses to leave — in dismissal compensation plus the pay for the term they had left plus a full year of post-term stability. That is why the closed list of who is protected matters so much: knowing exactly who is covered is what separates an ordinary termination from a bill that can run to several years of salary. And there is a middle route worth knowing: the person can be released from working with every payment maintained, on notice to the Ministry of Human Capital within 48 working hours — but that starts a ten-day clock to go to court. verif · Mar 6, 2026 ↗
The norm
Ley 27.802 on labour modernisation, Title XV ("Amendments to ley N° 23.551 – Trade Union Associations"), sections 138 (new s. 20 bis), 141 (new s. 29), 142 (new subsection c of s. 44) and 144 (new s. 52, read in full). Enacted on 27 Feb 2026, promulgated by Decreto 137/2026 and published in the Boletín Oficial on 6 Mar 2026. verif · Mar 6, 2026 ↗
Our reading
thesis Section 29 does not read alone: it reads alongside section 19 of Ley 14.250, which the same Ley 27.802 rewrote so that the narrower-scope agreement prevails over the broader one, earlier or later. Set side by side they give a complete sequence that neither of them states: first the company union can take trade-union status at that company, and then the agreement it signs beats the industry-wide one. ⇒ For a project of scale — a plant, a field with its own workforce — that means labour cost stops being a figure inherited from the industry and becomes something negotiated in-house. It is the biggest lever in Title XV and the least talked about. ⚠️ What could break this reading, and it has to be said plainly: this is a route, not an outcome. It requires six continuous months of a membership majority against an industry union that will not stand still, and the result is decided in an administrative procedure and, very probably, in court. Until there is a decided case, the sequence is written and untested. thesis
Where it lands, province by province
Applies the same nationwide
No effect lands differently in any one province: it applies the same across the country.
The other rules on this subject19
The comprehensive labor reform is now lawLey 27.802 (Official Gazette, Mar 6, 2026, promulgated by Decreto 137/2026)in force
Hire formally for 4 years with employer contributions of 2%+3%Decreto 315/2026 (Official Gazette, May 4, 2026), Ley 27.802 Title XXin force
The labor reform lands: transparent pay slip, ARCA and the end of ultra-activityDecreto 407/2026 (Official Gazette, Jun 1, 2026)in force
Ley Bases: labor modernization and registered employmentLey 27.742, Titles IV-V (Decreto 847/2024); Title II Ch. IV (Decreto 695/2024)in force
The dismissal number, section by sectionLey 27.802, ss. 51 and 54 to 56 (Title I), rewriting ss. 245, 276 and 277 of the Ley de Contrato de Trabajoin force
Ignacio Aredez· Chief analyst
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How to read the seals → verif primary source · prob primary source pending · unconf not sufficiently backed · estim our own calculation · thesis our reading