An election of coverage may be revoked by a declaration in writing of the employer and his surety filed with the commission. The effective date of such revocation shall be ten (10) days from the date of its filing, unless such declaration fixes a more remote date.
The cancelation of coverage by a surety shall revoke an election of coverage theretofore made, unless before the effective date of such cancelation the employer files substitute security, supplemented by the new surety’s consent to such election.