Again, it says, “Justin Trudeau, Prime Minister of Canada” and “pm.gc.ca”, then “Guide for Parliamentary Secretaries”. In point 4, “Standing Committees”, it says:
In light of their Government duties, parliamentary secretaries do not chair standing committees. For the purpose of clarity, a parliamentary secretary cannot be, or stand in for, a voting member of a committee that falls under their responsibility as [a] parliamentary secretary.
The parliamentary secretary’s key role in relation to a standing committee responsible for reviewing his or her minister’s department is to:
provide leadership on Government issues to the members on the committee;
in the absence of the minister, explain and defend the minister’s position before the committee;
assist in providing information on the Estimates of organizations in the minister’s portfolio and any other administrative matters; and
where appropriate, facilitate public service appearances before the committee and intervene if necessary to address political issues that may arise.
I think that makes it clear, Madam Chair, that there's no need to include a parliamentary secretary in any sort of motion. It should then be assumed that the parliamentary secretary will be invited in the absence of the minister attending.