Ala. Code § 8-1-41: Obligations Which Cannot Be Specifically Enforced.

The following obligations cannot be specifically enforced:

(1) An obligation to render personal service;

(2) An obligation to employ another in personal service;

(3) An agreement to submit a controversy to arbitration;

(4) An agreement to perform an act which the party has not power lawfully to perform when required to do so;

(5) An agreement to procure the act or consent of the wife of the contracting party or of any other third persons; or

(6) An agreement, the terms of which are not sufficiently certain to make the precise act which is to be done clearly ascertainable.