No man can come against his own act.

Explanation

A man who has conferred a right by grant cannot later impose conditions that destroy it — he is bound by what he has done.

Where this applies

• A company gave me a warranty but now they're trying to add exclusions after the fact.
• The government granted my permit and now wants to add new restrictions.

See also

• 6.7.1 To confirm is to make firm that which was before infirm.