Section 3C. A license shall be valid for a period of one year from the date of issue unless sooner suspended or revoked and shall be renewed by the division annually thereafter without examination, upon payment of the fee prescribed in section three. Applications for renewals of licenses shall be signed and sworn to by the applicant and shall be made on forms furnished by the division. Such application forms shall be mailed by the division to each auctioneer registered with the division, together with notice of the expiration of his license, not less than thirty days prior to such expiration.