4. The design and the installation of LNG fuel systems of LNG fuel ready ships are to apply Guidance for Gas-fuelled Ships in force at the time of contract for construction for the new-building. However, where a LNG fuel ready ship in accordance with this Guidance is converted to a gas fuelled ship after delivery, the ship shall comply with Guidance for Gas-fuelled Ships in force at the time of the ship conversion.

5. This Guidance is applicable to ships which intend to use LNG as fuel. Where this Guidance is ap- plied to ships which intend to use other gas fuels, special consideration is to be given.

102. Definitions

The definitions of terms in this Guidance are to be followed to Guidance for Gas-fuelled

103. LNG fuel ready levels

1. LNG fuel ready levels are defined in 2 steps as follows:

(1) The level of preparing the generic design

(2) The level of installing parts of the systems with the detailed design in addition to above (1)

2. The class notations defined in Sec 2 may be assigned where the ready level in Para 1 is in com- pliance with this Guidance.