"Labour tenant" is defined in section 1 as a person who: (a) is residing or has the right to reside on a farm; (b) who has or has had the right to use cropping or grazing land on the farm, referred to in paragraph (a), or another farm of the owner, and in consideration of such right provides or has provided labour to the owner or the lessee; (c) whose parent or grandparent resided or resides on a farm and had the use of cropping or grazing land on such farm or another farm of the owner, and in c