(7B)[The provisions of this section shall not apply to any undertaking, being a Unit referred to in clause (zc) of section 2 of the Special Economic Zones Act, 2005, which has begun or begins to manufacture or produce articles or things or computer software during the previous year relevant to the assessment year commencing on or after the 1st day of April, 2006 in any Special Economic Zone.] [ Inserted by Act 28 of 2005, Section 27 and Schedule II (w.e.f. 10.2.2006).]