If the retirement system manager requests any member of this plan who is receiving a disability retirement allowance and who is under the minimum age of qualification for voluntary service retirement to undergo a medical examination, and such member refuses to do so, his or her retirement allowance shall be suspended. If the member refuses to submit to such medical examination within three months from the time his or her allowance is suspended, his or her disability allowance shall be cancelled. In the event the member does submit to such medical examination within said three month period, then, in the event the retirement system manager determines that such member is still disabled, then the disability retirement allowance shall be reinstated as of the date of the medical examination. (Prior code § 34.06.623)