Mandatory experiment

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A mandatory experiment is a proposed change that the Hockey Rules Board of the International Hockey Federation (FIH) has included in the rules of field hockey. Everyone must play by this rule until the Hockey Rules Board decides whether or not to make it an official rule. During the period of a mandatory experiment the Hockey Rules Board is therefore very keen to get feedback through National Associations.

Before a mandatory experiment is introduced, the Hockey Rules Board will first encourage National Associations to trial the proposed change voluntarily in a recognised league or other series of matches and to report the results, after the Board considers a substantial rules change. If the results are favourable the Hockey Rules Board may then introduce a mandatory experiment.