5.3.34Auditor’s Fees and Services

Fees included in Other operating costs related to PwC, the 2016 and 2015 Company’s external auditor, are summarized as follows:

in thousands of US$

2016

2015

Audit fees

1,962

2,162

Out of which:

- invoiced by PwC Accountants N.V.

1,344

1,469

- invoiced by PwC network firms

618

693

Tax fees

32

92

Other

533

555

Total

2,527

2,810

In 2016 and 2015, 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 Company Sustainability Report.