1. Unless expressly specified otherwise, the requirements in the Guidance apply to Mobile Drilling Units for which contracts for construction are signed on or after 1 July 2015.

2. The amendments to the Rules for 2014 edition and their effective date are as follows;

Effective Date 1 July 2015

CHAPTER 2 CLASSIFICATION AND SURVEYS

Section 3 Surveys

- 303. has been newly added.

ANNEX 1 DRILLING SYSTEMS

CHAPTER 1 GENERAL

- 202.54 has been newly added.

CHAPTER 2 CLASSIFICATION AND SURVEYS

- Table 2.1 has been amended.

CHAPTER 4 DRILLING SYSTEMS

- 202. 2 (2) (E) has been newly added.

- 202. 2 (3) has been amended.

- 202. 3 has been amended.

- 204. 3, 5 and 8 have been amended.

- 302. 4 has been newly added.