If circumstances require you to cancel your 2018 International Conference on Ground Control in Mining registration, you must do so in writing. Written notice must be sent to firstname.lastname@example.org or by mail to SME Ground Control Conference Registration, c/o SME, 12999 E. Adam Aircraft Circle, Englewood, CO 80112. Cancellations received by June 25, 2018 will receive a refund, less a processing fee of $100. There are no refunds for no-shows and cancellations postmarked after June 25, 2018. Substitutions will be accepted in writing at no charge until June 25, 2018. After June 25, 2018, a $25 fee will be charged for substitutions. NO REFUNDS for Registration will be issued after the June 25, 2018 deadline.