The subpart is arranged by subject matter, in the same order as, and keyed to, the parts of the FAR. subpart 52.2 sets forth the text of all FAR provisions and clauses, each in its own separate subsection. 'Modification,' as used in this subpart, means a minor change in the details of a provision or clause that is specifically authorized by the FAR and does not alter the substance of the provision or clause (see 52.104).