sule 66RULE 66-QUO WARRANTO. Rule 66. Literally means by what authority Quo Warranto is a special civil action to determine the rht to the use and exercise of a public office or franchise,Order 21, rule 66. 21.34. A point concerning Order 21, rule 66, which was discussed in the earlier Report1 requires consideration. A recommendation had been made in the 14th Report' to