After the applicants complete the erection of a radio station to file the competent authority for qualification and inspection, the radio station license（as Attachment 5）shall be issued by the competent authority. Effective date for the license is 5 years.The microwave radio station installers（hereinafter referred to as the Installers）shall expire a license of a radio station within 1 month before 3 months of expiration to apply to the competent authority for renewal; The competent authority shall conduct technical inspection again, and then a new license is issued by the competent authority with qualified inspection. Effective date for new license starts from the next day of old license to be ineffective.