The commissioner may conduct an examination of the affairs of any provider as often as the commissioner deems it necessary for the protection of the interests of the people of this state. Providers shall maintain copies of their books and records in Colorado to provide access for the purposes of this article 49. The commissioner shall assess each provider at least semiannually, to cover the annual direct and indirect costs of examinations, supervision, and administration conducted pursuant to the provisions of this section. The assessments shall be calculated in terms of cents per thousand dollars of total escrowed entrance fees and reserves maintained. The assessment calculation, or ratio of the assessment charged to total escrowed entrance fees and reserves maintained, shall be alike in all cases. On or before the dates specified by the commissioner, each association shall pay its assessment. If deemed necessary, the commissioner may estimate a per diem rate to be charged for examinations and charge a provider for the actual cost of any examination documented by the commissioner.