An index of preliminary receipt numbers issued will be maintained in Form
___ and kept in the custody of the ___
a) MS-2, Postmaster b) MS-15, Postmaster
b) MS-15, SB PA d) None of these
___ and kept in the custody of the ___
a) MS-2, Postmaster b) MS-15, Postmaster
b) MS-15, SB PA d) None of these