Aren't these obligations too heavy for an on-call worker?

Questioner

My daughter has been given a contract as an on-call worker with the following conditions: She can be summoned at least 2 working days in advance with the obligation to come. Secondary activities must be approved in writing by the employer and are subject to a duty of confidentiality. In both cases, the fine will be €5,000 immediately in the event of a violation and €500 per day if the violation continues.

Lawyer

These provisions sound too strict for an on-call contract. Without having read the contract, I can say the following in general. In such a contract there can normally not be an obligation to appear at every call. A call can be refused. The part about the secondary activities almost seems like a kind of non-competition clause. This does not seem to me to be in place without further ado. It will then be very difficult to find another job. Confidentiality may be common depending on the job, but the penalty for violation is very high. It sounds like a contract that is too strict and not valid on all points. Below I have pasted a link about on-call contracts, you may find more information here. You can contact me if you require further advice. https://www.rijksoverheid.nl/onderwerpen/laborscontract-en-cao/question-en-answer/welke-contracts-zijn-er-voor-roepkracht