(i) An individual shall be deemed to be work limited if the social services official determines that, in accordance with the provisions of this section for determining disabilities, such individual has mental or physical impairments which would limit his/her ability to engage in work activities in accordance to the requirements of this Part.

(ii) In the case of an individual who is work limited, the social services official shall assign such individual to work activities only if the assignment:

(a) is consistent with the individual's treatment plan when such plan is prescribed by the individual's practitioner and/or the social services district's practitioner;

(b) where no treatment plan exists, that the assignment is consistent with the individual's mental and physical limitations; and

(c) is determined to be appropriate by the social services official who is satisfied that such individual is able to perform the work assigned and that such assignment will assist the individual's transition to self-sufficiency.