Investor-State Dispute Settlement Under TTIP – A Risk for Environmental Regulation?

Heinrich Böll Stiftung TTIP Series, December 2013

25 Pages Posted: 27 Mar 2014

Date Written: December 31, 2013


The Transatlantic Trade and Investment Partnership (TTIP) could include rules on investment protection, including so called investor- state dispute settlement (ISDS). ISDS is a system that allows private investors to sue a host state for the alleged violation of an international investment treaty concluded between that host state and the investor’s country of origin. The EU Commission’s negotiating mandate for TTIP and the US model bilateral investment treaty both indicate a preference for including ISDS in TTIP.

There are a number of clauses routinely contained in investment treaties that have the potential to restrict the right of governments to take environmental measures: the requirement of “fair and equal treatment” for investors, a prohibition on “(indirect) expropriation”, and the so-called umbrella clause. All of them are often broad and vague in wording, and; the case law interpreting them is not consistent.

Although investment tribunals never invalidate environmental regulations, nor have any similar direct impact on national environmental policies, they have – in some cases – awarded considerable compensatory payments to investors for a violation of the above clauses. The inclusion of any of these norms in TTIP would not automatically prevent the US or the EU adopting environmental measures in the future, nor would they necessarily have to pay compensation to investors whenever doing so. However, the results of ISDS proceedings are unpredictable. Some arbitration tribunals have taken a restrictive approach to governments’ regulatory freedom; others have deemed government regulation not to violate investment law. These uncertainties result in considerable risks for environmental regulation which are exacerbated by the fact that investment-related provisions tend to be interpreted broadly in ISDS proceedings.

There are no strong arguments for including ISDS rules in TTIP. Both the US and the EU have highly evolved, efficient rule of law legal systems. There is no evidence that investors have ever lacked appropriate legal protection through these systems. There is no bilateral investment treaty between the US and any of the old EU Member States, and yet US and EU investors already make up for more than half of foreign direct investment in each others’ economies. This demonstrates that investors seem to be satisfied with the rule of law on both sides of the Atlantic.

ISDS provides foreign investors with an additional judicial remedy that is not available to domestic competitors; this additional avenue of legal redress discriminates against domestic companies and has the potential to distort competition. Furthermore, the sheer size of foreign direct investment could lead to a considerable number of investment disputes. As a consequence, large numbers of disputes that normally would be adjudicated in domestic courts would be subject to international arbitration, bypassing domestic judges that have been elected or appointed by elected officials.

However, in the event that provisions on ISDS are nonetheless included in TTIP, this paper provides suggestions on how to formulate such provisions in order to mitigate the risk to environmental regulations.

Keywords: TTIP, investor-state dispute settlement, international investment law, trade, trade & environment

JEL Classification: K33

Suggested Citation

Gerstetter, Christiane and Meyer-Ohlendorf, Nils, Investor-State Dispute Settlement Under TTIP – A Risk for Environmental Regulation? (December 31, 2013). Heinrich Böll Stiftung TTIP Series, December 2013, Available at SSRN:

Christiane Gerstetter (Contact Author)

affiliation not provided to SSRN

Nils Meyer-Ohlendorf

Ecologic Institute


Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Abstract Views
PlumX Metrics