On-site work or equipment installation work which falls within the scope of installation as set forth in RCW 43.22A.010(6) shall not be performed on a manufactured home at any time after the initial installation of a manufactured home without the supervision of a certified manufactured home installer.

On-site work and equipment installation work shall not be performed until a permit for such work has been issued by the local enforcement agency. On-site work and equipment installation work must be inspected upon completion by the local enforcement agency in the same manner initial home installations are inspected.

On-site work and equipment installation work include, but are not limited to:

(1) Releveling a home such as installing all new pier blocks or footings;

(2) Complete skirting replacement;

(3) Installing earthquake resistant bracing systems; and

(4) Any other work described in RCW 43.22A.010(6).

On-site work and equipment installation work does not include routine maintenance or other routine repairs such as periodic adjustments to piers, replacement of a damaged pier, or skirting repair.