...occurred. (b) The provisions of the Federal Tort Claims Act and §§ 750.1-750.7 do not apply to : (1) Any claim based upon an act or omission of an employee...be valid; or based upon the exercise or performance of, or the failure to exercise or perform, a discretionary function or duty on the part of the Navy...

...exception from the scope of the provision quoted above. That provision does not apply to "Any claim * * * based upon the exercise or performance or the failure...a discretionary function or duty on the part of a Federal agency or an employee of the Government, whether or not the discretion be abused." [Emphasis...

...follows : The provisions of this chapter and section 1346 (b) of this title shall not apply to — (a) Any claim based upon an act or omission of an...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion involved be abused....

...2680. Exceptions The provisions of this chapter and section 1346(b) of this title shall not apply tola) Any claim based upon an act or omission of an employee...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion Involved be abused....

...claimant under the Federal Tort Claims Act would be faced with a unique set of exceptions to liability: Any claim based upon an act or omission of an employee...a discretionary function or duty on the part of a federal agency or an employee ot the Government, whether or not the discretion involved ^e abused....

...where the act or omission occurred." Excepted from such claims are two pertinent classes of claims : (a) Any claim based upon an act or omission of an...statute or regulation, whether or not such statute of regulation be valid, or based upon the exercise or performance or the failure to exercise or perform...

...Government, exercising due care, in the execution of a statute or regulation, whether or not such statute of regulation be valid, or based upon the exercise or...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion involved be abused....

...the government may be shielded from liability by the Tort Claims Act's exception barring any action "based upon the exercise or performance or the failure...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion involved be abused."...

...States for negligence based upon the Federal Tort Claims Actl shall not apply to . . . any claim . . . based upon the exercise or performance or the failure...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion involved be abused....

...tort claims. Of particular relevance here, 28 USC §2680(a) provides that the Act shall not apply to "[a]ny claim based upon an act or omission of an employee...a discretionary function or duty on the part of a federal agency or an employee of the Government, whether or not the discretion involved be abused."...