Texas Government Code - GOV'T § 311.016. “May,” “Shall,” “Must,” etc.

(1) “May” creates discretionary authority or grants permission or a power.

(2) “Shall” imposes a duty.

(3) “Must” creates or recognizes a condition precedent.

(4) “Is entitled to” creates or recognizes a right.

(5) “May not” imposes a prohibition and is synonymous with “shall not.”

(6) “Is not entitled to” negates a right.

(7) “Is not required to” negates a duty or condition precedent.