Retrospective statutes

There are certain principles which have been adhered to with great strictness by the courts in relation to the construction of statutes, as to whether they are or are not retroactive in their effect. The presumption is very strong that a statute was not meant to act retrospectively, and it ought never to receive such a construction if it is susceptible of any other. It ought not to receive such a construction unless the words used are so clear, strong, and imperative that no other meaning can be annexed to them, or unless the intention of the legislature cannot be otherwise satisfied.