- What starts the clock
- The fecha de la baja, meaning the date the person stopped being insured under the mandatory regime
- How long
- Within the last 5 years counted from the date of the baja, per the document's own example a baja on 8 September 2020 gives a filing deadline of 8 September 2025
- What is lost
- the source does not state what happens if this is missed
A formerly insured person who is en baja (no longer working under IMSS coverage) can request Continuación Voluntaria en el Régimen Obligatorio, known as Modalidad 40, only if they have at least 52 weeks contributed under the mandatory regime within the 5 years counted from the date of the baja. IMSS gives the example that a baja on 8 September 2020 sets a filing deadline of 8 September 2025.
What this means if you no longer live in Mexico
Modalidad 40 can be requested only by someone with at least 52 contributed weeks under the mandatory regime within the 5 years counted from the baja.
What the source does not say
The procedure document gives the eligibility window and a worked example of the deadline but does not state what happens if a person applies after the 5 year window has closed, nor does it quote the statutory text of LSS articles 218 and 219 that it cites as legal basis.