Md. Code, Family Law § 9.7–110

An abduction prevention order remains in effect until the earliest of:

(1) the time stated in the order;

(2) the emancipation of the child;

(3) the child turning 18 years old; or

(4) the time the order is modified, revoked, vacated, or superseded by a court with jurisdiction under §§ 9.5–201 through 9.5–203 of this article.