a previous unwritten expectation of perpetuity

enti

Saudi Aramco, Saudi Arabia’s state-owned oil giant, was granted exclusive rights for 40 years to drill for the country’s oil, the Financial Times reported. This would replace a previous unwritten expectation of perpetuity. The company continues to insist it will sell a stake to the public when conditions are right, after reports of long delays or even cancellation.

a previous unwritten expectation of perpetuity ：之前不成文的永久权的期待？预期？
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4 g! d( p6 M5 W6 H0 l/ [% Dexpectation的中文释义
8 K7 X0 Q  m" B9 V' t1  what you think or hope will happen 期待, 期望
7 C! @! A( U/ N5 n- ]/ }; ~2  a feeling or belief about the way something should be or how someone should behave 预期
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trivialstuff

$ w" q& y7 a! a, b5 j( xSaudi Aramco之前的独家采油权1999年到期了，但之后它并未被明文规定不得继续采集，所以大家都预料（expect）这项特许权实际意义上是永久性（perpetuity）的了。但这下好了，规定出台了，它只能继续享受40年的特许权，即40年的特许权取代了之前被预料的不成文永久特许权。
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7 w1 |# v' L/ g参考：

The previous concession ended in 1999, leaving a legal vacuum. Since then, “Aramco in effect holds an evergreen concession to exploit the reserves of the kingdom in return for a stream of income in the form of taxes, royalties and dividends,” according to a report by the Oxford Institute for Energy Studies.

4 c6 t3 u) q0 O' G7 `https://www.bloomberg.com/news/articles/2018-08-27/saudi-arabia-is-said-to-grant-aramco-40-year-oil-concession
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Aramco has lost unlimited access to Saudi Arabia's oil reserves

1 D0 G7 T! h2 b+ w- M- fhttps://www.businessinsider.com/saudi-aramco-loses-unlimited-access-to-oil-reserves-2018-8/

enti

原来是这样，感谢您的回复