Section 12. In section 12 of the principal Act,

12. In section 12 of the principal Act,— (a) in sub-section (1), for the words, brackets, figures and letter "under sub-section (1) or sub-section (2) or sub-section (3) of section 11B, the application and specification and other documents shall be referred to by the Controller", the words, brackets, figures and letter "under sub-section (1) or sub-section (3) of section 11B, the application and specification and other documents related thereto shall be referred at the earliest by the Controller" shall be substituted; (b) in sub-section (2), for the words "a period of eighteen months from the date of such reference", the words "such period as may be prescribed" shall be substituted.