4.3.34Auditor’s Fees and Services

Fees included in other operating costs related to PwC, the 2017 and 2016 Company’s external auditor, are summarized as follows:

in thousands of US$

2017

2016

Audit fees

1,861

1,962

Out of which:

- invoiced by PwC Accountants N.V.

1,009

1,344

- invoiced by PwC network firms

852

618

Tax fees

47

32

Other

101

533

Total

2,009

2,527

In 2017, the other auditor’s fees were mainly related to the review of the Company sustainability report.

In 2016, the other auditor’s fees were mainly related to other auditing services carried out in the course of the development of a potential master limited partnership (MLP) project and review of the Company sustainability report.