(a) A civil proceeding for the recovery of a pecuniary fine, penalty or forfeiture may be prosecuted in the district where it accrues or the defendant is found. (b) A civil proceeding for the forfeiture of property may be prosecuted in any district where such property is found. (c) A civil proceeding for the forfeiture of property seized outside any judicial district may be prosecuted in any district into which the property is brought. (d) A proceeding in admiralty for the enforcement of fines, penalties