Notwithstanding the provisions of Sections 16-200 and 16-201, a probationary status employee shall only be entitled to appeal an adverse action, and shall only be entitled to initiate a grievance where any such employee alleges that the basis of removal or acts of an appointing authority constituting the basis of a grievance as the case may be, were illegal or that a written statement as required under Section 16-171(c)(3) was not provided the employee.