That the fields to be considered as enclosed fields shall be enclosed all around so no animal can access them and, being enclosed in this way, even if the field had not gate or bolt, it shall be considered enclosed; and in case a gap was opened, the owner shall close it within six days so, having passed the six days [without having closed the gap], the field shall be considered open; and in case someone was caught in the field within the six days [after a gap had been opened], he shall be fined as if the field had been fully enclosed.