Mont. Code Ann. § 32-5-208

The department may reinstate any revoked license if there is not a fact or condition existing at the time of reinstatement that would have justified the department in refusing originally to issue the license. In any case in which the license has been revoked for cause, an application may not be made for issuance of a new license or the reinstatement of a revoked license for a period of 6 months from the date of revocation.