All certificates of competency issued by the board shall be valid for a period of
one calendar year commencing October 1, and terminating on September 30 of the following
year. Said certificate of competency may be renewed at any time without penalty if
said application for renewal is filed at least thirty (30) days prior to the date
of expiration of the certificate of competency. Failure to apply for renewal of a
certificate of competency prior to expiration shall render said certificate inoperative,
and it shall thereafter be unlawful for said person or firm to undertake, offer to
undertake, or purport to have the capacity to undertake, any offer or job in the contracting
field for which said certificate was issued, except upon payment of a delinquent fee
established by resolution of the commission.