Montana Mont. LBF 37. NOTICE of COMPLIANCE WITH Sec. 521 [MONT. LB 4002-1(f)] is a document that is used by employers in the State of Montana to verify their compliance with various labor laws. This document is used to comply with Section 521 of the Montana Labor Relations Board (LAB) 4002-1(f). This document must be completed and submitted by employers in order to certify that they have met the requirements of the law. There are two types of Montana Mont. LBF 37. NOTICE of COMPLIANCE WITH Sec. 521 [MONT. LB 4002-1(f)]: 1) the “Notice of Compliance” form and 2) the “Affidavit of Compliance” form. The “Notice of Compliance” form is used to certify that the employer is in compliance with the labor law, while the “Affidavit of Compliance” form is used to certify that the employer has taken all reasonable steps to ensure compliance with the labor law. Both forms must be completed and submitted in order for the employer to receive a certification of compliance.