if a primary school (“the new primary school”) becomes a feeder primary school of a secondary school which already has one or more feeder primary schools,

if a primary school ceases to be a feeder primary school of a secondary school,

if the curriculum of either the primary or secondary school is reviewed under section 12 of the 2021 Act,

if the assessment arrangements of either the primary or secondary school made under the Education (Arrangements for Assessing in the Curriculum for Wales) Regulations 20225 are reviewed,

if the governing bodies of all of the schools concerned consider it appropriate to do so, or

at the end of the period of 3 years beginning on the date on which the Transition Plan (or revised plan) was published.