This is the 3770th most frequent Turkish word.
çalışmasına
"Çalışmasına" means "to his/her/its working" or "to his/her/its work."
In this sentence, 'çalışmasına' is used to indicate the functioning or operation (gerund) of the project ('çalışma') and is in a possessive and dative case, showing purpose or intent.
Mühendis, projenin çalışmasına yardım etti.
The engineer assisted with the operation of the project.
Here, 'çalışmasına' refers to the musician's work or practice, possessively (of or by the musician) and in a directional or dative sense, as the action being observed.
Öğrenciler, müzisyenin çalışmasına dikkatle baktılar.
The students watched the musician's performance attentively.
In this case, 'çalışmasına' indicates 'their working' (of the workers) and employs a subjunctive construction, expressing a possibility or condition enabled by the new law.