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), HearingElimination (bowel or bladder functions), Verbal Communication (speech impediment), Mental FunctionsDressingVision (blindness or acutely reduced field of vision), Life-Sustaining Therapy (ex.: dialysis, respiratory therapy)