An appointing authority may lay off employees in the classified service, in accordance with the rules and regulations adopted under this part, whenever he or she deems it expedient because of shortage of work or funds or material changes in duties or organization, and seniority and service ratings of employees shall control in determining the order of layoffs. The appointing authority shall give written notice to the director of every proposed layoff, at least 10 days before the effective date thereof, and the director shall make such orders relating thereto as he or she considers necessary to secure compliance with the established rules and regulations. The name of any regular employee laid off shall be placed on the appropriate reemployment list.