(1) Except as noted in WAC 296-304-13001 and as provided in exemptions under WAC 296-304-15001(9), certification performed by accredited persons must conform to the requirements contained in this section.

(2) Safe working loads assigned to assembled units of gear must be based on applicable design criteria acceptable to the accredited person. Where no design data on which to base a rating is obtainable, the safe working load ratings assigned must be based on the owner's information and warranty that those so assigned are correct. Unit test certificates must state the basis for any such safe working load assignment.