An individual employed by a college or university, or by a private security business holding a contract with a college or university, who performs private security duties on a college or university campus and who carries a weapon while performing these duties shall meet all of the following requirements: 1. File with the sheriff of the county in which the campus is located evidence that the individual has successfully completed approved firearm safety training under section 724.9 . This requirement does not apply to armored car personnel. 2. Possess a permit to carry weapons issued by the sheriff of the county in which the campus is located under sections 724.6 through 724.11 . This requirement does not apply to armored car personnel. 3. File with the sheriff of the county in which the campus is located a sworn affidavit from the employer outlining the nature of the duties to be performed and justification of the need to go armed. 84 Acts, ch 1235, §13 ; 85 Acts, ch 56, §7 ; 2017 Acts, ch 69, §11 ; 2018 Acts, ch 1041, §22