Collocations for enforce - verb

fully, rigidly, rigorously, strictly, stringently, vigorously
The rules were strictly enforced.

consistently
selectively
effectively, properly
legally

can
The ban cannot be legally enforced.

be difficult to, be hard to, be impossible to
help (to)
a system of local inspectors to help enforce presidential decrees

seek to, take steps to
The government may take steps to enforce compliance with the new measures.

decline to, refuse to

Enforce is used with these nouns as the object:
ban, blockade, ceasefire, code, conformity, contract, curfew, decree, discipline, embargo, guideline, law, limit, order, patent, penalty, policy, prohibition, quarantine, recommendation, regulation, requirement, resolution, restriction, right, rule, sanction, segregation, standard, treaty, zone