Section 225 - Effect and applicability of act(a) The provisions of this act shall not affect the right to discharge any person for any cause other than those provided for by this act or without cause under existing law. No procedure provided by any existing tenure or civil service law shall be applicable in any proceeding under this act.(b) The provisions of this act shall not apply to exchange teachers who are citizens or subjects of a foreign government and whose appointments to teach in the public school system of the Commonwealth of Pennsylvania have been approved by the Superintendent of Public Instruction.(c) The provisions of this act shall not apply to teachers in the State colleges, who are citizens or subjects of the foreign governments and whose appointments to these positions shall be temporary, and shall not extend for a period of more than five (5) years, or who have duly sworn declarations of intent to secure United States citizenship in which case their appointments may extend beyond such five (5) year period for an additional two (2) year period, and have been approved by the Superintendent of Public Instruction.1951, Dec. 22, P.L. 1726, § 15. Amended 1961, Sept. 1, P.L. 1149, §1; 1965, Oct. 21, P.L. 639, § 1; 1967, Nov. 21, P.L. 526, §1; 1970, March 19, P.L. 194, No. 76, § 1.