(1)The retirement age on superannuation of the teaching staff of the Goa University and of the affiliated colleges of the Goa University, whether aided by the Government or not including the Principals of such colleges, shall be sixty two years:Provided that any member of the teaching staff referred to above who is due to retire on superannuation at sixty two years such member of the teaching staff shall be allowed to retire from the afternoon of the last day of the month in which age of superannuation is attained.