N.M. Code R. § 7.1.3.17
A written request for inspection may be determined by the custodian to be excessively burdensome or broad. An additional reasonable period of time is allowed to comply with such requests determined by the custodian to be excessively burdensome or broad. The length of this additional time is determined based upon whether negotiation occurs. A fifteen-day additional period is available to the custodian, without negotiation, upon written notification to the requester. A post-negotiation reasonable period of time is available to the custodian and is determined based on discussions with the requester.
C. The "negotiation" additional period of time is that period of additional time agreed to by the custodian and the requesting person, or, in the event no agreement is reached, as determined to be reasonable by the custodian after at least one good faith effort to negotiate with the person making the request. The custodian, as part of the good faith effort to negotiate, should describe the circumstances that cause the request to be excessively burdensome or broad, and suggest possible modifications to the request that would decrease the burdensome or broad nature of the request on the department, and should suggest an additional reasonable amount of time for responding to the request.
[10/31/96; Recompiled 10/31/01]