Tax exemption approval under section 10(23G) permits mobile-service enterprise conditional exemption subject to compliance and audited accounts. Approval is granted to M/s BPL Mobile Cellular Limited for its mobile telephone service project qualifying for tax exemption under section 10(23G) read with rule 2E, subject to compliance with those provisions, maintenance of books, audit by a qualified accountant, and furnishing the audit report; the Central Government may withdraw approval if the undertaking ceases infrastructure operations or fails accounting and audit obligations.