The 2005 Public Securities Validation Act shall operate to supply such legislative authority as may be necessary to validate any public securities heretofore issued and any such acts and proceedings heretofore taken that the legislature could have supplied or provided for or can now supply or provide for in the law under which such public securities were issued and such acts or proceedings were taken. The 2005 Public Securities Validation Act, however, shall be limited to the validation of public securities, acts and proceedings to the extent to which the same can be effectuated under the state and federal constitutions.