More information can be found on the Swiss Federal Department of Foreign Affairs' website under the Private Household Employees Ordinance of 6 June 2011 Directive.

• Members of the top management (“B” legitimation card)
• Senior officials (“C” legitimation card)
• Professional category officials (“D” legitimation card)

Source: Article 6 of the Private Employees...

The private servant must come unaccompanied.
Source: Article 9 d. of the Private Employees Ordinance

The private servant must work full-time (45 hours) for the same employer.  In exceptional circumstances, a private household employee may be authorised to work for a maximum of 2 employers.
Source: A...

The net salary is 1200 CHF minimum. Nothing can be deducted from this amount. A higher net salary may be stipulated in the employment contract.

Source: Article 43 of the Private Employees Ordinance...

A child minder is a person who has been given authority by the competent governing body to look after between 1-4 children in their home. Without approval the child minder is not authorised to work...