Section 13-202 - Certification(a) Except as otherwise authorized under § 13-201(b) of this subtitle, a unit may not execute or renew a contract for the employment of a contractual employee unless the Secretary issues to the unit a certification that:(1) the employment of the contractual employee is for services that cannot be performed by assignment or hiring of any nontemporary employee;(2) the rate of pay for the contractual employee is comparable to the rate paid to employees in positions that involve comparable duties, responsibilities, experience, and authority; and(3) the services to be performed under the contract encompass functions that:(ii) are needed for a limited time;(iv) need to be implemented quickly and for which there is no reasonable alternative.(b) The Secretary may issue a certification for any effective period that does not exceed the period of the contract between the unit and the contractual employee.