N.M. Stat. § 59A-47-42
Coverage of part-time employees.
A health care plan that provides coverage for health care pursuant to the Nonprofit
Health Care Plan Law shall make available, upon an employer's request prior to
issuance, delivery or renewal, coverage for regular part-time employees who work or
are expected to work an average of at least twenty hours per week over a six-month
period. Nothing in this section shall be construed to require an employer to offer or
provide coverage for regular part-time employees.