As always, it depends on your local code in force at the time of the work.
If your applicable code is, or is based on IPC (International Plumbing Code)
606.2.2 requires a shutoff on the water supply to every sillcock.
And in that case, you can treat sillcock and hose bibb as functionally equivalent (so far as needing a shutoff) even though a sillcock is functionally superior in terms of not freezing, if you take the hose off.
Other codes may be similar (they often are, but sometimes not, and local amendments happen, too.) Now that we know where this is:
What appears to be your local code in force at the time of the work:
The 2017 Oregon code is less than clear on the subject. Welcome to "why standard codes are usually better than home-grown codes." Section 606.5 refers to "control valves before each appliance...appliance supply or slip joint"
But is a Sillcock/hose bibb an appliance? Neither word shows up in the definitions section of the document. The explicit mention in IPC is clear - this provides too much wiggle room for sloppy plumbing, IHMO. "Claim it's not an appliance and skip the valve!"
606.3 requires being able to shut off supply to each dwelling unit without shutting off other dwelling units, but no mention of things not connected to a particular dwelling unit.