N.M. Stat. § 2-3-2
There hereby is created a legislative council service for the use of the members of the legislature, the governor and the various departments, institutions and agencies of this state that may desire to avail themselves of its services. Notwithstanding the availability of the legislative council service to the various departments, institutions and agencies of this state, it is a part of the legislative branch of the government, and shall conduct itself with strict regard to the division of powers among the legislative, executive and judicial branches of the government of this state. Such legislative council service shall assist and cooperate with the legislative council and with any interim legislative committee or commission created by the legislature or appointed by the governor at their request.
NMS § 2-3-2