SECTION 1. Section three of Republic Act Numbered Seven hundred ninety-three is amended to read as follows:
"Sec. 3. This temporary permit shall continue to be in force during the time the government has not established similar service at places selected by the grantee and is made upon the express condition that the same shall be void unless the grantee completes the construction of at least two radio stations within two years from date of approval of this Act."