The phrase "be based on provisions of the charter" can be expressed using several synonyms. It can be substituted with "derive from the charter stipulations," "grounded on the charter requirements," or "built upon the charter provisions." Other synonyms include "established on the charter rules," "resting on the charter tenets," and "founded on the charter principles." The meaning of these synonyms aligns with the original phrase, emphasizing the importance of the provisions of the charter in guiding decisions and actions. Having these synonyms in your vocabulary enlivens your writing and strengthens your communication skills.