Participant shall execute and deliver a joinder agreement to the Stockholders Agreement dated as of February 14, 2017, by and among the Company and certain other parties, as the same may be amended from time to time (the “Stockholders Agreement”), or such other documentation which may set forth certain restrictions on transferability of the shares of Stock acquired upon exercise or purchase, a right of first refusal of the Company with respect to shares of Stock, and such other terms or restrictions as the Board shall from time to time establish, including, without limitation, any drag-along rights or transfer restrictions and registration rights.