If continued monitoring is needed, yes, but monitoring/consultations only - not necessarily continued x-rays/scans. It depends on the medical code listed in the CoPR if monitoring is needed. IMHO - children are pretty much carriers of antibodies of TB due to the vaccinnation for BCG in early childhood (in the PH), so expect that during medicals - the percentage of antibodies in the child's body is greater than that of us adults, so this becomes a common reason for diagnosis of Prim Complex/inactive TB for children. Monitoring (if needed) will taper off over time.
AUS and CAN should have different criteria as they have different immigration and health policies. There are other criteria that results in shortening the validity of the visa (and thus "expediting" the landing date) but you have leeway to ask CEM where the validity date is based if you see it is shorter than the usual 1-year from MR.
You may be referring to the validity date of the visa here. When to land is your option but must be done before the expiry/end of validity of the visa.
. Unless there is a specific reason to expedite your entry (IMHO - diagnosis and treatment of Prim Complex does not lead to expedition of landing - if needed, a monitoring program and schedule is provided) - expect the typical date/validity duration.
/...hth