'may derogate' is a correct and usable phrase in written English.
You can use it to describe a situation in which someone has the ability or authority to act against a rule or obligation. For example, "The governing body has the power to derogate from the standard rules of the organization when necessary."
For derogations for existing pipelines (connected to EU pipelines before the entry into force of this directive), the member state in which the first entry point of the pipeline is located may derogate from the new rules, provided this derogation is not detrimental to competition in the EU.
Derogations from economic, social and cultural rights The question of whether state parties may derogate from economic, social and cultural rights in times of public emergency has been a matter of much debate.
The impairment of prefrontal lobe function after sleep deprivation may derogate these kinds of reality monitoring, which are necessary to determine whether or not a word was actually encountered before or internally generated [43], [44].
Since norms often interact with each other (for example, a permission may temporarily derogate an obligation, or a prohibition and obligation may conflict), understanding the effects of norms and their interactions becomes increasingly difficult as the number of norms increases.
Similarly, individuals may also derogate or devalue other persons in a bid for self-enhancement [ 23].
As derogating is a somewhat extreme measure, whether or not a particular right may be derogated from, and under which circumstances, is usually laid down in the text of a human rights treaty.
The use of opening clauses in Belgium seems to be exceptional in the present recession (Keune 2011) and the law does not provide for exemptions, however in practice sectorally defined standards may be derogated from if the agreement explicitly allows for this through opt-out clauses.
However, it may be deduced that at least the minimum core of subsistence rights may not be derogated from, even during situations of public emergency threatening the life of the nation.
To derogate from the representation may amount to an abuse of power or unfairness.
Poorly damped resonance frequencies often cause self-excited vibrations, so called chatter vibrations, which derogate the machined surface and may cause tool breakage.
They do not derogate from and cannot be interpreted as derogating from, the said international obligations.
