There are a handful of ironclad rules to obey (see two below), but if you follow just one, let it be this: Don't put it in the dishwasher. (bonappetit.com)
Regardless of which return to play guidelines a child's school or sports program follows for concussions, they are just guidelines, not ironclad rules, with a child's return to play determined on case - by - case basis. (MomsTeam.com)
Travel professionals caution that ironclad guarantees of getting you where you want, when you want and how you want can be hard to come by. (creditcards.com)