require (requires 3rd person present) (requiring present participle) (required past tense & past participle )
1 verb If you require something or if something is required, you need it or it is necessary.
FORMAL If you require further information, you should consult the registrar... V n
2 verb If a law or rule requires you to do something, you have to do it.
FORMAL The rules also require employers to provide safety training... V n to-inf
3 If you say that something is required reading for a particular group of people, you mean that you think it is essential for them to read it because it will give them information which they should have.
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required reading phrase
...an important research study that should be required reading for every member of the cabinet.