Table B-2. Table of Class Lives and Recovery Periods Table B-2. Table of Class Lives and Recovery Periods Summary: This table lists the recovery periods (in years) for depreciable assets used listed business activities. The table lists the asset class, description of asset, the recovery periods for: Class Life (in years), General Depreciation System (Modified Accelerated Cost Recovery System) and Alternative Depreciation System. This section lists the asset classes of 21.0--Manufacture of Tobacco and Tobacco Products to 26.1--Manufacture of Pulp and Paper.