7. (1) Foreign private investment shall not be expropriated or nationalised or be subject to any measures having effect of expropriation or nationalisation except for a public purpose against adequate compensation which shall be paid expeditiously and be freely transferable. (2) Adequate compensation for the purpose of sub-section (1) shall be an amount equivalent to the market value of investment expropriated or nationalised immediately before the expropriation or nationalisation.