Schedule 1 Supplementary provisions relating to Contributions of Classes 1, 2 and 3

1. Class 1 contributions where earner employed in more than one employment
2. Earnings not paid at normal intervals
3. Method of paying Class 1 contributions
4. General provisions as to Class 1 contributions
5. Power to combine collection of contributions with tax
6. General regulation-making powers
7. Deduction of contributions from pension, etc.