In the same manner as you described, we don't know who showed up for regularly-scheduled militia musters. As best I know, no such records are at the Alabama State Archives or in an Alabama county courthouse. Except for rolls of volunteer militia companies (who BTW were exempt from regular militia duty), we don't even know who was expected to appear at company assemblies. The only value these assembly rolls had would be to determine who was absent and therefore subject to fine, or who appeared without a weapon or reasonable facsimile (another fine).

As you mentioned earlier, one key difference between simply doing your duty and being called into service is pay. If you're going to be paid, your name, job title and start date must appear on a pay roll. Those rolls are retained for audit purposes if no other.

For example, when the Governor of Alabama called eight volunteer companies to seize and hold Fort Morgan and the U S Arsenal at Mount Vernon (Jan 3, 1861), officers and men of each company were placed on a roll which was submitted to the state treasurer for payment. Each of these companies had been in existence for months, even years without ever being called into service. We know when and where each company organized under the law, but don't have any record of the number of times officers and men assembled for drill or parade. Public notices for company drill and parade often appeared in antebellum and early war newspapers, but that's about it.

If I understand, anyone taking regular classroom/administrative duties must sign a W-2 and an I-9 form. You probably had to submit to a background check when you applied. Once you accept a full or part-time assignment, is it fair to say your duties will change?

Along those lines, my wife recently worked as a County Registrar for Shelby County. There are annual limits on the number of days a registrar can report for pay. The militia also had a limited service term before returning home to their normal duties. In most states this was ninety days. Unless you're full time, aren't there limits on service time you can report?