no hard and fast rules

no hard and fast rules

No rules or guidelines that are binding, rigidly adhered to, and/or clearly defined. The manager has no hard and fast rules, so he has no way of keeping his employees in line. Unfortunately, the drug is so still so new that there aren't really any hard and fast rules about proper dosage.
See also: and, fast, hard, no, rule
References in periodicals archive ?
As we have seen, vernacular names can be misleading, and no hard and fast rules apply.