[take] effect
1
(of an action, process, or change) to begin to produce the intended results or outcome
- The changes in diet and exercise started to take effect, and he felt healthier.
- The medication usually takes about 30 minutes to take effect and alleviate the pain.
- The treatment will gradually take effect and improve her condition over time.
- The environmental conservation efforts of the community have taken effect, leading to cleaner air and water.
2
(of a rule, law, or policy) to officially become valid and enforceable
- The new company policies will take effect on the first day of next month.
- The government announced that the tax changes would take effect immediately upon approval.
- The new law will take effect on January 1st of next year.
- The contract amendments will take effect once all parties involved have signed the revised agreement.
- The policy changes are expected to take effect immediately.