yolanda Speece (asker) Apr 4, 2006:

It has to do with licensing of the individuals providing services. Example: you need so many hours performing a service to gain a certificate such as cosmetology. You have cut so many heads of hair or you have performed so many manicures.

THat is what they mean by certification licensing and credentialling activities.

I performed XXXX service on (individual) on (day and date as well as time)