Mr. V.P. Gopalan Nambiar, the Advocate General of Kerala, contended (1) that the absence of two years ' notice under the old s.7(4) of the did not confer upon the appellant a vested right to hold the license until the expiry of December 2, 1970, and the immunity from compulsory purchase under the old s.7 arising from the non service of the requisite two years ' notice could be, and, in fact, was taken away by the new s.6, which required only one year 's notice of intention to purchase the undertaking; (2) assuming that the appellant acquired under the old s.7 a vested right to hold .the license until December 2, 1970, such vested right was taken away by the new s.6, which expressly applies to licenses granted before its commencement, and the period of 25 years is a period specified in as the license on the expiry of which the option of purchase was legally exercisable; (3) sub sections (4) and (5) of the new s.6 did not cut down the plain meaning of sub s(1) of the section and the option on the expiry of the period of 25 years was vested 'under sub s(1) of s.6, though this period did not expire 18 months after September 5. 1959; and (4) as the State Electricity Board did not send to the State Government any intimation in 'writing 'of ' its intention to exercise the option on the expiry of December 2, 1960 as required by sub s(4) of s.6, the Board must be deemed to have elected not to exercise this option, and consequently by sub S(2) of s.6.