CPD: Compliance with new dutyholder roles

What legislation introduced the new roles of the principal designer and principal contractor under the new dutyholder regime?

Construction (Design and Management) Regulations 2015
Building Safety Act 2022 and the Building Regulations etc. (Amendment) (England) Regulations 2023
Housing Grants, Construction and Regeneration Act 1996

Which party has an absolute obligation to ensure that all building work complies with all relevant requirements?

How long can an individual be imprisoned for if they fail to comply with the new dutyholder regime?

If a principal contractor feels they are no longer competent to carry out the role, what should they do?

What happens if a principal designer or principal contractor delegates their role to a third party?

Nothing, they are permitted to delegate aspects of the role to a competent third party
Nothing, however, the legal responsibility for the role will remain with the duty holder
All of the above