top lease
top lease 重叠租赁；覆盖租赁；接续租约 指：１在前一租约尚未期满时签订的租赁，前后两项租赁的期限有所重叠；２后续的石油、天然气租赁中，含有在先存续的租约之一项或多项矿产权益；３对已受油气租约支配的财产再作租赁。通常重叠租赁只在原已存在的租约期满之时才授予权利。
top lease
top lease
Oil & gas. A lease granted on property already subject to an oil-and-gas lease. • Generally, any rights granted by a top lease are valid only if the existing lease ends. [Cases: Mines and Minerals 56. C.J.S. Mines and Minerals §§ 194–195, 233.]