https://revenue.alabama.gov/2011/09/to-all-persons-severing-coal-within-the-state-of-alabama-expiration-of-0-135-per-ton-coal-tax-levy/ 2017-09-07T21:26:26+00:00 monthly 0.2 https://revenue.alabama.gov/2011/09/monthly-abstract-september-2011/ 2017-07-26T18:05:28+00:00 monthly 0.2