Regulations are the type of primary law that is created by executive branch administrative agencies. Regulations are created by both federal and state government administrative agencies. When administrative agencies first publish their primary law (e.g. in the Federal Register or the New York State Register), that primary law is referred to as Rules. After the primary law is codified (arranged by subject) and published in a regulatory code (e.g. the C.F.R. or New York's N.Y.C.R.R.) that primary law is referred to as Regulations.
Because regulations resemble statutes, when agencies enact regulations, they are said to be acting in their quasi-legislative capacity. When agencies hold hearings and impose penalties, they are said to be acting in their quasi-judicial capacity. When agencies investigate and prosecute violators, they are said to be acting in their quasi-executive capacity.
Online access to state administrative regulations varies widely. The Guide to the Law Online from the Law Library of Congress describes governmental resources available from each of the fifty states.
New York Code of Rules and Regulations (hosted by Westlaw)
New York Code of Rules and Regulations from Justia
New York State Register - view the current day's New York State Register
An Overview of Administrative Rule-Making Procedure in New York (from NYS Division of Administrative Rules)
Unlike administrative regulations, there is no central source for accessing administrative agency opinions/adjudications. You can often find agency opinions on the agency's website. Use this A to Z list of U.S. government departments and agencies, to find the website of the agency you are interested in researching, and then search or browse for opinions.
Also, the University of Virginia Law Library maintains a comprehensive list to help you locate federal government administrative agency opinions.
As with federal administrative agency opinions, there is no central source for New York State agency opinions, but you can often find these opinions on the agency's website. Use this A to Z list of New York State agencies to find the website of the agency you are interested in researching, and then search or browse for opinions.
Also, the University at Buffalo Law Library maintains a list to help you locate New York State administrative agency opinions.
The New York State Office of Administrative Hearings conducts hearings for the professions and occupations regulated by the New York Department of State.