Here, we take a step-by-step look at tracing the legislative history of a Maryland statute. In many cases, print resources mentioned herein have online analogues (and vice-versa). Occasionally online information providers will offer a disclaimer to the effect that the material is unofficial, or not to be cited as authoritative in, e.g., court filings. If that is indeed what you intend it for, then check and cite to the print version.
Once a statute is enacted by the General Assembly, it is added to a compilation of annual session laws, listed in chronological order of enactment by chapter number. So, the first law enacted by the General Assembly during the 1994 Legislative Session is Laws 1994, ch. 1. Here they remain until such time as they are codified under an appropriate subject heading(s) in the Code.
The session laws contain a "redlined" version of the law--not literally red, but using strikethroughs and allcaps to indicate where material was added or deleted from prior versions of the law, allowing you to trace amendments to particular session laws.
Also important for legislative history research is the fact that the session law identifies the corresponding bill number, which will enable you to track the law back further to the appropriate chamber's journal.
See also: Maryland General Assembly and Maryland Session Laws, 1632-2008.
