摘要:There are obviously a great number of issues which could be addressed in a paper dealing with the freehold oil and gas lease. Our paper will be limited to a discussion of three of these issues: 'first, the practice of top leasing and selected problems relating thereto, secondly, the question of estoppel as a method of reviving an otherwise terminated lease and thirdly, shut-in royalty payments focusing on when such a payment is required to be made in order to extend the term of the lease and the conditions which must be present before such a payment may be validly tendered.