What are the criteria for admissibility to health related tax credits ?

According to the income tax legislation in Canada, to be admissible a person must have or have had a health restriction for 12 consecutive months (or longer) which is either temporary or permanent and has slowed down their daily activities in one or more of the following functions: Walking (reduced mobility), Feeding (including the preparation of meals), Hearing, Elimination (bowel or bladder functions), Verbal Communication (speech impediment), Mental Functions, Dressing, Vision (blindness or acutely reduced field of vision), Life-Sustaining Therapy (ex.: dialysis, respiratory therapy)