An application for a permit shall be made under oath. Subject to subsections (c) and (d) of this section, the Secretary may charge a nonrefundable fee payable when an application is filed for a permit. The fee may not exceed: $125 for an initial application; $75 for a renewal or subsequent application; and $20 for a duplicate or modified permit. The fees under this subsection are in addition to the fees authorized under § 5–305 of this subtitle. The Secretary may reduce the fee under subsection (b) of this section accordingly for a permit that is granted for one day only and at one place only. The Secretary may not charge a fee under subsection (b) of this section to: a State, county, or municipal public safety employee who is required to carry, wear, or transport a handgun as a condition of governmental employment; or a retired law enforcement officer of the State or a county or municipal corporation of the State. The applicant shall pay a fee under this section by an electronic check, a credit card, or a method of online payment approved by the Secretary.