Small Business Committee Request for Status Update on FAR Subcontracting Rule. in Proposed Law & Regulations; Legal Decisions Posted October 9 · Report reply Contracting officers have to use the clauses prescribed in the FAR -- they cannot decide to omit or change contract clauses mandated by 48 CFR simply because it seems to them that 13 CFR differs. Once the FAR Councils and the SBA come to agreement, all will be well. In the meantime, contracting officers have to follow the FAR, right? 48 CFR = the FAR; 13 CFR = SBA Regulations.