Interest groups...
a. used to use the format of submitting amicus curiae briefs to the courts, but such a practice was forbidden by the Paperwork Reduction Act of 2001.
b. while very common in the ordinary political process, they are rather unheard of in the judicial realm.
c. may provide legal advice to a litigant but are strictly forbidden by law from providing direct financial assistance to a litigant.
d. Do not participate in any way in the judicial realm of government.