Two of the orders amend the COVID-19 Public Health Response (Isolation and Quarantine) Order that was put in place last year. That's the order that establishes managed isolation and quarantine. Amendment Order (No 2) updated the definition of medical examination and testing to include the use of saliva testing. Amendment Order (No 3) prescribed the requirements for self-isolation by those taking part in the Government's self-isolation project. There was one concern expressed by the Regulations Review Committee, which said that the order "assumes a link between a person's participation in the programme and their employer.", which would not necessarily be the case, but the rationale for creating a legal obligation on the employer for the behaviour of the participant is to ensure that the employer only puts forward employees who the employer trusts to participate in that pilot programme.