The phrase "authorities mainly" is correct and usable in written English.
It can be used to indicate that the focus or primary concern is on the authorities in a particular context.
Example: "The report highlights the actions taken by authorities mainly in response to public safety concerns."
Alternatives: "primarily the authorities" or "chiefly the authorities".
Authorization was sought from local authorities mainly chiefs, elders and elected officials.
The authorities mainly emphasise forced treatment.
Senior American intelligence officials said all credible threat information in recent weeks had been passed to Pakistani authorities, mainly through the United States Embassy in Islamabad.
Choosing methods to assess student program outcomes is a matter of balancing best practices against the constraints imposed by the respective education authorities mainly the Engineering Accreditation Council (EAC) for engineering degrees offered by institutions of higher education in Malaysia.
"The different ideologies they brought to Catalonia have made counterterrorism quite challenging," in Catalonia, compared to countries where authorities mainly engage with one region or country of origin, she said.
Another source, who asked to remain anonymous, said the idea was quashed "due to the political sensitivity it could raise about Congolese authorities, mainly due to their poor response in terms of prevention and the [lack of] evolution on the justice and prosecution procedures".
Opinions as to whether this oversteps the president's authority mainly break down along political lines.
After a succession of revolts against Chinese authority, mainly in the north, a measure of autonomy was granted.
Senators who now want to dilute the mayor's authority — mainly Senator John Sampson, the new Democratic conference leader, and his allies — must recognize that this is not the time to meddle with something that works.
In Lebanon, 2.5% of articles fell under the theme of Organizational authority mainly within Accreditation.
The database does not contain information on indicative diagnoses, drugs sold over the counter or drugs not reimbursed by the county authority (mainly oral contraceptives, sedatives and hypnotics).
