Regarding loading condition of periodic mapping test of cold storage

I have a question about mapping test.

we conducted periodic mapping test with maximum loading.
but many companies conducted periodic mapping test with normal(now) loading.
they said when they conduct first performance qualification or mapping test, then using maximum loading. but after that if they conduct periodic mapping test, they using normal loading.

Is there any guideline that we can conduct periodic mapping test with normal loading? We are now writing RA for that, but I want a support base such as guideline