(a) Types of licenses. Each license must be identified by type, which indicates the business activity authorized under the license.(1) Type PL--For planning, supervising, certifying, installing, or servicing of all fixed systems other than pre-engineered systems. A system planning licensee may also perform, supervise, or certify the installation or servicing of all pre-engineered fixed systems and portable fire extinguishers.(2) Type A--For certifying or servicing the installation of all fixed fire extinguisher systems, other than pre-engineered systems; or for installing, certifying, or servicing all pre-engineered fixed fire extinguisher systems, and certifying and servicing of portable extinguishers.(3) Type B--For servicing, certifying, and low-pressure hydrostatic testing of portables.(4) Type K--For installing, certifying, or servicing pre-engineered fixed fire extinguisher systems for the protection of cooking areas, and certifying and servicing portable extinguishers.(b) Proof of licensure. A licensee must be able to show proof of licensure while engaged in the activities of the business.(c) Duplicate license. A duplicate license must be obtained from the state fire marshal to replace a lost or destroyed license. The license holder or registered firm must submit written notification of the loss or destruction, accompanied by the required fee.(d) Revised license. The change of a licensee's registered firm or mailing address requires a revised license. Within 14 days after the change requiring the revision, the license holder or registered firm must submit written notification of the necessary change accompanied by the required fee.(e) Restrictions.(1) A licensee must not engage in any act of the business unless employed by a registered firm and holding an unexpired license.(2) A license is neither temporarily nor permanently transferable from one person to another.(3) A registered firm must notify the state fire marshal within 14 days after termination of employment of a licensee.(4) A Type A or Type K license will not be issued to an individual unless the individual has held an apprentice permit or a Type B license for at least six months or has held a license to service fixed extinguisher systems for at least six months from another state.