How have the various amendments affected the scope and content of List I?
The various amendments have made changes to the scope and content of List I, which outlines the subjects on which Parliament may make laws. Some of the significant changes are as follows:

1. Ins. by the Constitution (Fifteenth Amendment) Act, 1963, s. 12 (with retrospective effect): This amendment added Corporation tax to List I, enabling the central government to impose taxes on companies' income.

2. Subs. by the Constitution (Seventh Amendment) Act, 1956, s. 29 and Sch. for entry 79 (w.e.f. 1-11-1956): This amendment substituted entry 85 in List I with a new entry related to taxes on capital value of assets, taxes on the capital of companies, estate duties, etc.

3. Subs. by the Constitution (One Hundred and First Amendment) Act, 2016, s. 17(a)(i) for entry 84 (w.e.f. 16-9-2016): This amendment substituted entry 85 in List I with a new entry related to taxes on the consignments of goods where such consignment takes place in the course of inter-State trade or commerce.

These amendments have expanded and redefined the scope of taxation power vested with the central government, allowing it to impose various types of taxes that were previously beyond its jurisdiction.