@Sridhar,
As per detail posted by you,it may be safely concluded that your parent's application is being processed at CPC-Ottawa.Processing time depends on the disposable inventory at CHC.Ordinarily,it takes at the most 120 days from the date of receipt of medical results and other docs,as called for by CHC.
As regards submission of medicals, I am afraid,it is no where written that it's proof is to be submitted to CHC at the address you have quoted .Rather it has been instructed that, in the event of applicant's failure to access the attached document (IMM 1017E + Medcal instructions),CHC can be contacted at the email/ address given therein.The medical result shall be sent/uploaded directly by MO for CHC scrutiny.Yes, for the safer side,we may ask MO to issue a certificate/ signed IMM form which can be couriered along with other docs to CHC,retaining their copies for our record.
Hope, it may suffice.
Good luck. God bless all !!!
mspjal