ARTICLE 9
Whenever it is necessary to establish uniform rules, the Commonwealth has jurisdiction over:
1. The promotion of social welfare;
2. The protection of public order and safety.
ARTICLE 10
The Commonwealth may prescribe by law fundamental principles concerning:
1. The rights and duties of religious associations;
2. Education, including higher education and libraries for scientific use;
3. The law of officers of all public bodies;
4. The land law, the distribution of land, settlements and homesteads, restrictions on landed property, housing, and the distribution of population;
5. Disposal of the dead.
ARTICLE 11
The Commonwealth may prescribe by law fundamental principles concerning the validity and mode of collection of State taxes, in order to prevent:
1. Injury to the revenues or to the trade relations of the Commonwealth;
2. Double taxation;
3. The imposition of excessive burdens, or burdens in restraint of trade on the use of the means and agencies of public communication;
4. Tax discriminations against the products of other States in favor of domestic products in interstate and local commerce; or
5. Export bounties;
or in order to protect important social interests.