Section 9(2) in The Cost Accounting Records (Petroleum Industry) Rules, 2002
(2)Where the company is manufacturing products other than the products or activities under reference, the records shall clearly indicate the basis followed for apportionment of the common overheads including head office expenses of the company to such products and to products or activities under reference including capital works as applicable. Where certain expenses forming part of overhead can be identified with a particular activity or a product, such expenses shall be segregated and charged to the relevant activity or product in the first instance and thereafter the residual expenses under the above categories of overheads shall be apportioned on a reasonable and equitable basis and applied consistently. The overheads chargeable to capital works shall be indicated separately in the cost records. The basis of apportionment or absorption of overheads to the cost or work centers or departments and products shall be indicated in the cost records. The records shall be maintained in such a manner as to indicate the details of other overheads for exploration, production, transportation, refining, administrative and marketing and distribution etc, as applicable.
