Which of the following statement(s) correctly describes a provision of a section 403(b) plan?

1. Assets within a 403(b) plan may be invested in individual securities

2. AN ERISA 403(b) may not include a vesting schedule

3. A 403(b) plan must pass the ACP test if it is an ERISA plan

4. In certain situations, a participant of a 403(b)plan can defer an additional $15,000 as a catch-up to the 403(b) plan.