Employees of the City and County shall have the right to form, join and participate in the activities of employee organizations of their own choosing for the purpose of representation on all matters of employee relations. Employees of the City and County shall also have the right to refuse to join or participate in the activities of employee organizations. Employees shall also have the right to represent themselves individually in their employment relations with the City and County, consistent with Government Code section 3502. No employee shall be interfered with, intimidated, restrained, coerced or discriminated against because of his or her exercise of those rights.