FISC warrants certainly have an enforcement mechanism - FISC allows for show cause and other motions to force compliance.
also
"Not with regard to FISC warrants. Perhaps with regard to pen registers and trap-and-trace orders under FISA, issued by a judge (or magistrate judge) of the FISC, but those are distinct from surveillance warrants."
If by "FISA warrant", you mean production orders or surveillance orders to electronic providers, this is wrong.
See 50 USC 1861(f) and 50 USC 1881a(h)
Both make clear, as do the FISC rules, that FISA warrants and production orders may be challenged in FISA court by a party.
If by FISA warrants, you mean something the government can do on it's own without the help of anyone else, then yes, you are correct, you would have to challenge this when they use the info against you.
also "Not with regard to FISC warrants. Perhaps with regard to pen registers and trap-and-trace orders under FISA, issued by a judge (or magistrate judge) of the FISC, but those are distinct from surveillance warrants."
If by "FISA warrant", you mean production orders or surveillance orders to electronic providers, this is wrong.
See 50 USC 1861(f) and 50 USC 1881a(h)
Both make clear, as do the FISC rules, that FISA warrants and production orders may be challenged in FISA court by a party.
If by FISA warrants, you mean something the government can do on it's own without the help of anyone else, then yes, you are correct, you would have to challenge this when they use the info against you.