The phrase "acting in the course of" is correct and usable in written English.
It can be used to describe actions taken as part of a specific activity or duty, often in legal or formal contexts.
Example: "The employee was acting in the course of his duties when the incident occurred."
Alternatives: "performing in the scope of" or "operating within the framework of".
The amendments would allow state and territory law enforcement officers acting in the course of their duty to gather information about people subject to control orders for the purposes of protecting the public from a terrorist attack.
Employers will be liable for the discriminatory acts of employees where those employees are acting in the course of their employment.
Which is relevant because, as every student of tort knows, the question of whether Anna or anyone else in her position has a legal case here depends on whether Kennedy was acting in the course of his employment.
"It seems to me that it would be prudent to have a policy that sets out in one place the factors that prosecutors will take into account when considering whether or not to prosecute journalists acting in the course of their work as journalists," he told the Inquiry.
"He was not acting in the course of his employment.
In UK law there is a presumption that "Generally, a person will not be acting in the course of his official duties as a servant of the Crown when doing something that is prohibited by the general law".
The offences commonly known as disorderly conduct in a public place, unlawful assembly, offences concerning the assaulting, obstructing and disobeying of a police officer acting in the lawful course of his duty are all retained in Hong Kong legislation, and all carry both pecuniary and prison sentence penalties.
Women weren't nominated in any film categories outside of acting in the Golden Globes this year, but of course the fairer sex completely stole the show at the unofficial preamble to the Academy Awards.
(And Mr. McMahon has been both types in the course of acting as his own long-running character, "Mr. McMahon," on the shows).
