(i) in a case where the annual profits of the housing or other activities which are integral part of a highway project can be arrived at in accordance with the regular method of accounting followed, the profits so arrived at as computed under the provisions of the Act;
(ii) in any other case, the amount of profits arrived at based on the percentage of completion of the activities referred to in clause (i) during the relevant previous year.
(2) Every assessee shall maintain separate accounts for the activities referred to in sub-rule (1) and shall submit a certificate from an accountant, specifying the amount credited to the reserve account and the amount utilised during the relevant previous year for the highway project.
Explanation : For the purposes of this rule, "accountant" means,—
(i) a Chartered Accountant within the meaning of the Chartered Accountants Act, 1949 (38 of 1949); or(3) The certificate referred to in sub-rule (2) shall be in Form No. 10CCC.
(ii) any person who, in relation to any State, is, by virtue of the provisions in sub-section (2) of section 226 of the Companies Act, 1956 (1 of 1956), entitled to be appointed to act as an auditor of companies registered in that State.
Reference/Source: Check at Income Tax site for latest version of the Rules - link