The department may, as an alternative to denial, suspension, or revocation of certification under section 231D.5, conditionally issue or continue certification dependent upon the performance by the adult day services program of reasonable conditions within a reasonable period of time as prescribed by the department so as to permit the program to commence or continue the operation of the program pending full compliance with this chapter or the rules adopted pursuant to this chapter. If the adult day services program does not make diligent efforts to comply with the conditions prescribed, the department may, under the proceedings prescribed by this chapter, suspend or revoke the certificate. An adult day services program shall not be operated under conditional certification for more than one year.