The phrase "in force" is used to describe something that is currently valid, active or operating. Synonyms for this phrase include "effective," "operative," "enforced," "active," "current," "valid," "in effect," "in operation," "in place," and "functioning." These words convey a sense of authority and legitimacy, indicating that the rule, policy or law is being actively followed or executed. By using different synonyms for "in force," a writer can add variety to their language and avoid repeating the same phrases. These synonyms can also help in making the text more engaging and informative for the reader.