The phrase "act when it comes" is correct and usable in written English.
It can be used to indicate taking action at the appropriate moment or when a specific situation arises.
Example: "You need to be prepared to act when it comes to making important decisions in your career."
Alternatives: "respond when the time is right" or "take action when the opportunity arises".
But Ikea really needs to smarten up its act when it comes to its after-sales service – it's clear from online talkboards that there are many other unhappy and frustrated customers complaining of lengthy battles to get shoddy goods replaced or refunded.
LinkedIn is under immense pressure to clean up its act when it comes to prostitution on its site.
ASIC wanted NAB to lift its act when it comes to remediating customers after charging them fees for no service.
Image caption The National again focuses on the Debate Night programme which will be on the new BBC Scotland channel, with SNP depute leader Keith Brown claiming the broadcaster needs to "clean up its act" when it comes to audience selection for the politics show.
Gateway also has straightened out its act when it comes to tech support.
Nor has Manpower cleaned up its act when it comes to wage and hour violations.
If you thought the British high street had cleaned up its act when it came to falsely advertised meat, think again.
The UPA had repealed the tough Prevention of Terrorism Act when it came to power on grounds that it was abused by the security agencies.
The minister said the looming foreign fighters package would address "shortcomings" in the Customs Act when it came to detaining persons of interest.
Those might have happened anyway, but they got a fair share of their formless force from the Administration's initial decision to not really bother with Congress and the War Powers Act when it came to Libya.
But Williams dropped the comedic act when it came time to exact meaningful change.
