Here’s some good stuff:
https://www.cbe.ab.ca/careers/Documents/Terms-and-Conditions-of-Employment-CBE-Exempt.pdf (scroll down to page 7)
https://www.aupe.org/media/agreements/2015-01-01_to_2017-12-31_00038739x0.PDF (scroll down to last appendix at very end)
https://www.wheatlandcounty.ca/images/edocman/policies/Section%206%20-%20PERSONNEL%20POLICIES.pdf (scroll down to page 48)
https://www.albertahealthservices.ca/assets/careers/careers-emp-terms-and-conditions-employee-handbook.pdf (scroll down to page 10)
https://www.hsaa.ca/wp-content/uploads/2018/02/COVENANT-CA-REV-FINAL.pdf (scroll down to p. 18)
GOOD STUFF BUT NOT FROM ALBERTA
https://www.uottawa.ca/administration-and-governance/policy-12-work-hours-overtime-and-additional-work-support-staff (scroll down to Secs 29-30)
https://www.solarwindsmsp.com/blog/7-steps-getting-your-call-pay-policy-right
https://www.algonquincollege.com/hr/support/call-back-on-call-pay/
https://www.uoguelph.ca/hr/node/4107/
https://www.ucalgary.ca/hr/files/hr/aupe-collective-agreement.pdf (scroll down to p. 30)
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Hope that helps. Glenn