73 . This court need not consider the reasonableness of the exercise of jurisdiction because of its holding regarding Dish’s insufficiency of contacts with Massachusetts. See Cossaboon, 600 F.3d at 39 n. 7 (citing Sandstrom, 904 F.2d at 89). 74 . Mem. Defs.’ Mot. Dismiss, 7-9 [# 26], 75 . Lambert v. Kysar, 983 F.2d 1110, 1116 n. 10 (1st Cir. 1993). 76 . Silva v. Encyclopedia Britannica, Inc., 239 F.3d 385, 386 (1st Cir.2001) (quoting The Bremen v. Zapata Off-Shore Co., 407 U.S. 1, 10, 92 S.Ct. 1907, 32 L.Ed.2d 513 (1972)); see also The Bremen, 407 U.S. at 15, 92 S. ., 975 F.Supp. 170, 176 (D.P.R.1997) (explaining that mandatory terms include "shall,” "exclusive,” "only,” and "must”); Perez-Llantin v. Sea Star Line, LLC, No. 06-1406CCC, 2006 U.S. Dist. LEXIS 46262, at *2-3 (D.P.R.2006) (<HOLDING>). 84 . 1st Am. Compl., Ex. B [# 15], 85 . See
holding that a forumselection clause may be enforced under rule 12b3 as a motion to dismiss on the basis of improper venue holding that a forumselection clause was mandatory where it stated that for any action brought to enforce such terms and conditions venue shall lie exclusively in clark county washington holding that venue in the district identified in  9 was mandatory holding that remand to state court was appropriate where mandatory forumselection clause placed venue in a specified county of the state holding that a forumselection clause was mandatory because it provided for exclusive jurisdiction and venue in a particular court