SF30 Amendment of Solicitation/Modification of Contract

There are uncertainties in my agency whether an SF30 can be used to amend RFQs under simplified procurements. In reading FAR Part 13.307, it states that "SF30, ......form may be used to modify a purchase order, unless an agency form/automated format is prescribed in agency regulations". This clearly tells me that under simplified procurements, SF30s may only be used to modify purchase orders not amend RFQs. Any feedback??