Are TAG Appointments mandatory for the Team to fill?

[martinthomson]

In #810, it seems like there is some lack of clarity about whether the Team is required to appoint TAG members or whether they are simply given the option of doing so (and maybe encouraged to do it).

(Most of the text below is from this section of the current process document.)

The case for a mandatory appointment is made implicitly, with statements like this one:

The TAG consists of [...] Three participants appointed by the Team;

And

The Team is responsible for appointing 3 of the participants to the Technical Architecture Group.

And this one in this later section:

When an appointed TAG seat is vacated, the Team appoints a replacement.

That all seems unequivocal, if not a direct requirement, but then there are statements like:

The Team should actively seek candidates for appointment to the TAG, [...]

And maybe even subtle nods like:

The Team's choice of appointee(s)

Though that last one might just be in recognition of the staggered nature of appointments, noting that some years the Team will only have a single appointment to make.