Dublin Police Act, 1859

One justice may do any act directed to be done by more than one justice.

11. It shall be lawful for any one justice to sign and execute any warrant or other instrument, or to do alone at any of the said police courts, or at any place where for any special purpose he may by warrant under the hand of the said Chief or Under Secretary be directed to attend and to act singly, any act which by any law now in force, or by any law not containing an express enactment to the contrary hereafter to be made, is or shall be directed to be signed, executed, or done by more than one justice.

[S. 12 rep. 56 & 57 Vict. c. 14. (S.L.R.)]