Personal liberty in wartime 297 Alien enemies 297 Eminent domain 298 Clauses 15 and 16. Militia 299 Militia clauses 299 Calling out the militia 299 Regulation of the militia 299 Clause 17. Seat of government, etc. 300 Seat of government 300 Nature and extent of rights ceded to United States 301 Retrocession of Alexandria county 301 Continuance of State laws 302 Status of the district today 302 Legislative power over the district 303 Taxation in the district 303 Delegation of legislative power to municipal officers 304 Courts of the district 304 Authority over places purchased 305 "Places" 305 Duration of federal jurisdiction 305 Reservation of jurisdiction by States 306 Clause 18. "Necessary and proper" clause 307 Coefficient or elastic clause 307 Scope of incidental powers 307 Operation of coefficient clause 308 Definition and punishment of crimes 308 Chartering of banks 309 Currency regulations 309 Power to charter corporations 310 Courts and judicial proceedings 310 Special acts concerning claims 311 Maritime law 311 Section 9. Powers denied to Congress 312 General purpose of the section 312 Clause 1. Importation of slaves 312 Clause 2. Suspension of the privilege of the writ of habeas corpus 312 Habeas corpus 312 Purpose of the writ 312 Errors which may be corrected on habeas corpus 313 Habeas corpus not a substitute for appeal 314 Issuance of the writ 314 Suspension of the privilege 315 Clause 3.