In a nutshell the EU policy is: 1. Constitution (where there is one) 2. Laws, Regulations (e.g. Central Banks) 3. Contract Simple scenario: So even if one

In a nutshell the EU policy is: 1. Constitution (where there is one) 2. Laws, Regulations (e.g. Central Banks) 3. Contract Simple scenario: So even if one signs a contract for "breaking a leg in the workplace and not reporting it", that clause is moot. It may even invalidate the contract in its entirety for being against Constitution/ Laws/ Regulations. So if you break a leg in the workplace, there is a law for that, which will auto-kick-in (pun intended) (investigations, responsibility/accountability assigned), thus the specific contractual clause will not "hide" the employers or the employee's negligence (depending on your imaginary scenario) or even the fact.