The norm, in detail
One registration only: ARCA, and IERIC cannot ask for more
Ley 27.802, section 155 (Title XIX)
in forceNATIONAL
Labor
Derives from: The comprehensive labor reform is now law
Registering the worker with ARCA is full and sufficient, and IERIC is barred from demanding an additional registration. What section 155 says and what it leaves untouched.
What changed and who it applies to
What changed
Employers register their workers with ARCA (Agencia de Recaudación y Control Aduanero) "in accordance with the rules that body issues, such registration being deemed full and sufficient for all legal purposes". And the second paragraph closes it with no margin: "Once registration with ARCA is evidenced, all requirements demanded of employers regarding worker registration shall be deemed fulfilled". ⭐ The part that changes a construction firm's day is named explicitly: the Instituto de Estadística y Registro de la Industria de la Construcción (IERIC) "shall adapt its systems and internal rules to this law, recognising as valid and sufficient the registration requirements established by ARCA, it being prohibited for that Institute — or any other authority — to require, serve notice on or condition employers or workers on compliance with registration requirements additional to or different from those established by the competent national authority". The prohibition is not for IERIC alone: it says "or any other authority", and that reaches a municipality or a provincial body demanding a registry of its own. verif · Mar 6, 2026 ↗
In force
In force with the law, from 6 March 2026. ⚠️ With one caveat the section itself writes in: registration is whatever ARCA provides "in accordance with the rules that body issues". The prohibition on IERIC is operative from day one; the concrete content of the procedure depends on what ARCA issues, and we have not yet opened that rule. verif · Mar 6, 2026 ↗
Are you in or out?
To every construction company, and particularly to one going to work on a site in another province. Construction was the only industry still carrying its own national registry on top of social security, and with it its own counter, deadlines and notices. This section reduces it to one. For an SME qualifying as a supplier to a large project the effect is concrete and measurable: one procedure fewer per worker and per site, and a notice that can no longer arrive. It also reaches the construction worker, who no longer has to evidence registration in two places to be taken on. ⚠️ And IERIC itself, which continues to exist with its statistics and industry-registry functions, but cannot impose conditions through worker registration. verif · Mar 6, 2026 ↗
The norm
Ley 27.802 on labour modernisation, Title XIX, section 155 — the title's only section. 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 The law chose a technique here that is worth looking at, because it explains why the section works: it did not repeal IERIC's registry, it barred it from demanding it. Repealing it would have opened a debate about the whole construction regime; barring the demand solves the employer's problem without touching Ley 22.250. ⇒ For the works supplier the effect adds to that of section 129 and both point the same way: making it cheaper to bring your own crew to a distant site. One removes the local-list filter, the other removes the parallel registry. It is R10 in its most literal form — the demand for works already exists; what changes is the cost of meeting it. ⚠️ What could break this reading: the procedure that really weighs not being registration but the rest of the construction regime — the Severance Fund, the record book, the site permit — which this section does not touch. And ARCA not yet having issued the rules the section itself refers to. 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