"rules in effect" is correct and usable in written English. It can be used in many contexts, such as referring to an existing set of rules or laws. For example, "The rules in effect prohibit any dogs on the beach."
For voluntary suspension requests that fall under the rules in effect prior to April 30 , 2016 reinstate payments effective with the month requested.
By 1981, Pas was countering UMNO's Muslim-Malay nationalism by attacking the ruling coalition for preserving a "colonial constitution, infidel laws and pre-Islamic rules" — in effect challenging the very legitimacy of modern Malaysia as a nation-state.
PARKING Sunday rules in effect.
Sunday rules in effect.
Roads Alternate-side parking rules in effect.
Alternate side parking rules: in effect.
Sunday parking rules in effect.
PARKING -- Sunday rules in effect.
When are alternate-side parking rules in effect?
The court ruled, in effect, that when there are conflicting statutes, common sense and good practice must rule.
There also seems to be a golden rule in effect about working together to solve problems.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union