11.1. Any eligible person without a spouse who is 25 years of age or under, in respect of whom someone would exercise parental authority if the person were a minor, is deemed to attend an educational institution on a full-time basis if the person suffers from one of the following impairments and, for that reason, attends such institution on a part-time basis as a duly registered student:
(1) severe visual impairment: visual acuity in each eye, after correction by means of appropriate ophthalmic lenses, excluding special optical systems and additions greater than 4.00 dioptres, is not more than 6/21, or the field of vision in each eye is less than 60° in the 180° and 90° meridians, and, in either case, the person is unable to read, write or move about in an unfamiliar environment;
(2) severe hearing impairment: the ear having the greater hearing capability is affected by a hearing impairment evaluated, according to 1992 standard S3.21 of the American National Standard Institute, to be an average of at least 70 dB, in aerial conduction, on any of the 500, 1,000 or 2,000 Hertzian frequencies;
(3) motor impairments, where they result in significant and persistent limitations for the student in the performance of his daily activities: loss, malformation or abnormality in the skeletal, muscular or neurological systems responsible for body motion;
(4) organic impairments, where they result in significant and persistent limitations for the student in the performance of his daily activities: disorder or abnormality in the internal organs forming part of the cardiorespiratory, gastrointestinal and endocrinal systems.