I just don't know what the authors had in mind here.
Keep in mind the MOU and Cooperative Agreement are dated 1996. This predates 9/11, Shuttle Columbia recovery, Katrina, Rita, Sandy and other major activations of USAR teams, NIMS, NRF, creation of DHS and the move of FEMA into it, as well as changes in CAP structure. Some references within the documents are obsolete.
While these events might not change what the authors had in mind, they are signifcant enough that revisions to the documents are warranted per section F(2) of the MOU. From personal knowledge working with USAR teams and FEMA, I can't see when CAP would be needed, or qualified, to be employed as a component of the US&R program as it operates today.