The phrase "statutory requirement" refers to a rule or law that must be followed. It is a legal obligation that is set by a government and must be complied with. Full definition
To date, no party has committed itself to introducing statutory requirements for secondary school class sizes, at least partly because of the different class teaching arrangements in secondary schools. (politics.co.uk)
The methods and processes used for determining these variables have to comply with statutory requirements. (eon.com)
The comptroller's office issued a set of recommendations that in sum amount to one charge: Make sure to meet statutory requirements in a timely fashion. (timesunion.com)