He introduced a dual exchange rate mechanism in February 1992 and unified exchange rate mechanism in February 1993, effectively engineering a further devaluation of about 30 per cent. The introduction of Export Promotion Capital Goods scheme allowing import of capital goods at low rates of duty against export obligation and the introduction of value based advance license (VABAL) scheme in 1992 got the corporate sector interested in exploring export markets. The VABAL scheme gave way to the Passbook scheme in 1995 and later to the Duty Entitlement Passbook scheme in 1997 inducing more businesses to explore opportunities in the global markets. During his first term as PM in 2004–09, exports of services were incentivised through the Served from India scheme for the first time. Targeted subsidies like the Focus Market scheme, Focus Product scheme, Market Linked Focus Product scheme, Vishesh Krishi Gram Udyog Yojana scheme, and incentives for incremental exports helped boost exports. Meanwhile, quantitative restrictions were abolished, and legal dispensations for the Special Economic Zone scheme were put in place. India started entering into bilateral treaties for free trade and comprehensive economic cooperation.