Doctrine of inalienable State powers 349
Eminent domain power inalienable 349
Taxing power not inalienable 350
Police power: When inalienable 351
Private contracts 352
Scope of the term 352
Source of the obligation 352
Ogden _v._ Saunders 353
Remedy a part of the obligation 354
Establishment of the rule 354
Qualifications of the rule 355
Municipal Bond cases 356
Private contracts and the police power 357
Emergency legislation 358
Individual rights versus public welfare 359
Evaluation of the clause today 359
Statistical data pertinent to the clause 361
Clause 2. Not to levy duties on exports and imports 362
Duties on exports and imports 362
Scope 362
Privilege taxes 363
Property taxes 364
Inspection laws 364
Clause 3. Not to lay tonnage duties, keep troops, make
compacts, or engage in war 365
Tonnage duties 365
Keeping troops 366
Interstate compacts 366
Background of clause 366
Subject matter of interstate compacts 368