Section 102. Undertaking to accompany application for discharge

The
  application shall  be  accompanied  by  an  undertaking  to  the  lienor
  executed  by  at  least  two sureties in a sum at least twice the amount
  specified in the warrant, to the  effect  that  the  person  making  the
  application  for  the discharge of the vessel will pay the amount of all
  claims and demands which shall be established to be due to the person in
  whose behalf the warrant was issued, and to have been a subsisting  lien
  on  the  vessel  at  the  time  of its issue. The undertaking when found
  sufficient, must be approved by the justice to whom the  application  is
  made  as  to the sufficiency of the sureties, and the lienor may examine
  the sureties as to their sufficiency at such time and places as  may  be
  fixed by such justice.