General The requirements for conditions of Classification for entire units and offshore structures are contained in the ABS Rules for Conditions of Classification ?C Offshore Units and Structures (Part 1). Additional requirements specific to position (pre-laid) mooring systems and equipment are contained in this Guide. The provisions of this Guide apply to mobile offshore units intended to be connected to pre-laid mooring systems. Section 2 of this Guide provides the technical requirements for the optional symbol: (P-PL) (Position (pre-laid) mooring systems) for mobile offshore units. Section 3 of this Guide provides the survey requirements for optional symbols: (P-PL) (Position (pre-laid) mooring systems) and (M-PL) (Position (prelaid) mooring equipment) for mobile offshore units. At the request of the Owners@ the position (pre-laid) mooring systems or equipment may be verified for compliance with the provisions of Sections 2 and 3@ with the appropriate class symbol assigned.