4. In the case of an admission body falling within the description in paragraph 1(b), where at the date of the admission agreement the contributions paid to the body by one or more Scheme employers equal in total 50% or less of the total amount it receives from all sources, the Scheme employer paying contributions (or, if more than one pays contributions, all of them) must guarantee the liability of the body to pay all amounts due from it under these Regulations.E+W