NIM33209 | Voluntary National Insurance contributions for periods abroad – Conditions of payment of voluntary Class 2 or Class 3 contributions
From HM Revenue & Customs · National Insurance Manual
A person’s entitlement to pay voluntary Class 2 or 3 NICs whilst abroad is also subject to the conditions in regulation 148 SSCR 2001 which provides for time limits for payment and specific circumstances when voluntary NICs are payable.