Section 225 ILCS 330/15.5 - [Section Scheduled to be Repealed 1/1/2030] Titles(a) A professional land surveyor may use the initials "P.L.S." and "L.S." and the title of "Professional Land Surveyor" or any of its derivations in Illinois.(b) A surveyor intern may use the initials "S.I." and the title of "Surveyor Intern" or any of its derivations in Illinois.Added by P.A. 101-0313,§ 10, eff. 8/9/2019.