Part-time teachers CANNOT acquire permanent tenure.

Part-time teachers cannot acquire permanent tenure. In Saint Mary’s University v. CA, it was held by the Supreme Court that a part-time member of the faculty cannot acquire permanent employment status under the Manual of Regulations for Private Schools, in relation to the Labor Code. Only when one has served as a full-time teacher can he acquire permanent or regular status.
In another case, it was ruled that for a private school teacher to acquire permanent status in employment, the following requisites must concur: (1) the teacher is a full-time teacher; (2) the teacher must have rendered three (3) consecutive years of service; and (3) such service must have been satisfactory.