| 2018-02-08 | Senate | Reported from the committee on Senate Ways and Means |
| 2018-02-08 | Senate | Recommended new draft of S591 |
| 2018-02-14 | Senate | Amendment #2 (Tarr) adopted |
| 2018-02-14 | Senate | Amendment #3 (Spilka) adopted |
| 2018-02-14 | Senate | Substituted for S591 |
| 2018-02-14 | Senate | Ordered to a third reading |
| 2018-02-14 | Senate | Read third and passed to be engrossed |
| 2018-02-15 | House | Read; and referred to the committee on House Ways and Means |
| 2018-02-28 | House | Committee recommended ought to pass with an amendment and referred to the committee on House Steering, Policy and Scheduling |
| 2018-02-28 | House | Committee reported that the matter be placed in the Orders of the Day for the next sitting with the amendment (H4256) pending |
| 2018-02-28 | House | Rules suspended |
| 2018-02-28 | House | Read second, amended by substitution of a new text (H4256) and ordered to a third reading |
| 2018-02-28 | House | Rules suspended |
| 2018-02-28 | House | Read third |
| 2018-02-28 | House | Amendment 4 adopted |
| 2018-02-28 | House | Amendment 5 rejected |
| 2018-02-28 | House | Passed to be engrossed - 139 YEAS to 14 NAYS (See YEA and NAY in Supplement, No. 313) |
| 2018-03-15 | Senate | Rules suspended |
| 2018-03-15 | Senate | Senate concurred in the House amendment with a further amendment -see Roll Call #329 (Yeas 38 to Nays 0) |
| 2018-03-19 | House | Referred to the committee on Bills in the Third Reading |
| 2018-03-21 | House | Rules suspended |
| 2018-03-21 | House | House concurred in the Senate amendment |
| 2018-03-22 | House | Enacted |
| 2018-03-22 | Senate | Enacted and laid before the Governor |
| 2018-03-30 | Executive | Signed by the Governor, Chapter 63 of the Acts of 2018 |