A dedicatory instrument is the document that sets forth the rules and policies for operating a subdivision, etc.
It's in the Texas Property Code. See: http://www.statutes.legis.state.tx.us/Docs/PR/htm/PR.202.htm
(1) "Dedicatory instrument" means each governing instrument covering the establishment, maintenance, and operation of a residential subdivision, planned unit development, condominium or townhouse regime, or any similar planned development. The term includes a declaration or similar instrument subjecting real property to restrictive covenants, bylaws, or similar instruments governing the administration or operation of a property owners' association, to properly adopted rules and regulations of the property owners' association, or to all lawful amendments to the covenants, bylaws, instruments, rules, or regulations.
Doc Stephens, REALTORÂ®