Supplementary occupational pension funds may be authorised, under the conditions defined in Article L. 324-1, to transfer all or part of their portfolio of contracts to one or more supplementary occupational pension funds, mutual insurance companies or supplementary occupational pension unions referred to in Article L. 214-1 of the French Mutual Code and institutions for supplementary occupational retirement provision referred to in Article L. 942-1 of the French Social Security Code.