72.29 Stay of proceedings in collision, etc. proceedings until security given
If a claim in rem, being proceedings to enforce any claim as referred to in rule 72.2(a), is begun and a cross claim in rem arising out of the same collision or other occurrence as the first mentioned proceedings is subsequently begun, or a counterclaim arising out of that occurrence is made in the first mentioned proceedings —
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(a) if the ship in respect of or against which the first mentioned proceedings is brought has been arrested or security given to prevent her arrest; but
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(b) the ship in respect of or against which the cross proceedings are brought or the counterclaim made cannot be arrested and security has not been given to satisfy any judgment given in favour of the party bringing the cross proceedings or making the counterclaim,
the court may stay proceedings in the first mentioned claim until security is given to satisfy any judgment given in favour of that party.