(1) The department may adopt by rule changes in, or additions to, the standards adopted in s. 320.823 or s. 320.8231, which are approved and officially published by the institute or promulgated by the Department of Housing and Urban Development subsequent to the effective date of this act. (2) The department or its authorized agent may enter any place or establishment where mobile homes are manufactured, sold, or offered for sale, for the purpose of ascertaining whether the requirements of the code and the rules adopted by the department have been met.