Except as herein otherwise provided, the entrance salary for employees entering County service shall be the minimum salary for the class to which appointed. When warranted, the Human Resources Director, with the department head’s recommendation, may approve an entrance salary, which is more than the minimum salary. The Director’s decision shall be final. Such a salary may not be more than the maximum salary for the class to which the employee is appointed unless such salary is designated as a Y rate by the Board of Supervisors.