Jede Marke = neue Fassung dieser Einheit an dieser Inkrafttretens-Stufe; Klick öffnet den Vergleich.
| 01.01.2021 | 08.01.2021 | 01.07.2021 | 01.01.2022 | 01.07.2022 | 01.01.2023 | 01.01.2024 |
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| § 2 | | | | | | | |
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| § 3 | | | | | | | |
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| § 4 | | | | | | | |
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| § 9 | | | | | | | |
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| § 10 | | | | | | | |
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| § 11 | | | | | | | |
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| § 12 | | | | | | | |
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| § 12a | | | | | | | |
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| § 12b | | | | | | | |
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| § 12c | | | | | | | |
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| § 14 | | | | | | | |
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| § 15 | | | | | | | |
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| § 16 | | | | | | | |
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| § 17 | | | | | | | |