21 February 2011
An "Act" is a "... written ordinance of Parliament, Congress, etc." whereas a law is "a rule or system of rules recognized by a country or community as regulating the actions of its members and enforced by the imposition of penalties."
Acts are made by the consensus between the two parts of a bicameral legislature for example, a law however may (for example in the United Kingdom) be made by an "enabling act" allowing a government minister to make sets of rules sometimes compiled with experts in the field, impractiable to do in Parliament.
An advantage of delegated legislation are that it can include local laws for local people. One disadvantage however is that it is not democratic and so are usually repealed after an Act of Parliament is made.
An "Act" is an action made by a legislature, a "law" is a wider term for any rules of governance