Registrants may also request credits based on learning acquired through work, volunteer, or other life experiences. Learning may be assessed through submission of an academic portfolio and/or challenge processes such as tests, demonstrations, or interviews. A fee is charged for each course challenged. A maximum of 75 per cent of the requirements for a Humber credential may be achieved through the PLAR process. A learner must earn a minimum of 25 per cent of the required credits through regular study at Humber. Prior Learning Assessment and Recognition forms are available from Customer Service and Registration Centre or at humber.ca/plar.