In this part—
"court" means the Supreme Court.
"defendant" means a person against whom relief is sought in a representative proceeding.
"group member" means a member of a group of persons on whose behalf a representative proceeding has been started.
"representative party" means a person who starts a representative proceeding.
"representative proceeding" means a proceeding started under section 103B .
"sub-group member" means a person included in a sub-group established under section 103M .
"sub-group representative party" means a person appointed to be a sub-group representative party under section 103M .