(1) Any alteration or conversion of the construction, plumbing, mechanical, or electrical equipment prior to or during installation of a factory-built building, which bears an insignia, shall void such review, and the insignia shall be returned to or be confiscated by the bureau, unless the review of the bureau is first obtained.

(2) The following changes shall not constitute alterations according to the provisions of this rule:

(a) repairs with approved component parts;

(b) conversion of listed fuel burning appliances in accordance with the terms of their listing;

(c) adjustment and maintenance of equipment; and

(d) replacement of equipment in kind.