New Mexico Statutes Chapter 50. Employment Law § 50-10-3. Detection of flammable gas or vapor; danger suspected; entry without cautioning against use of exposed flame or creation of electrical spark unlawful

In the event that the presence of flammable gas or vapor is detected in any sewer, or there exists reasonable ground for suspecting the danger therein of any such gas or vapor, then it shall be unlawful, irrespective of compliance with Section 1 above, for any person, firm or corporation to require, authorize or knowingly permit any such employee or controlled person to enter into said sewer, through a manhole or otherwise, without first cautioning such employee or controlled person against using any exposed flame or creating any electrical spark while in or about the said sewer.