(a) The Parent shall take, and cause each other Loan Party to take, such actions as are necessary or as the Administrative Agent or the Required Lenders may reasonably request from time to time to ensure that the Secured Obligations are (i) secured by first priority, perfected Liens on substantially all of the property (real and otherwise), rights and other assets of the Greens Creek Group with respect to the Greens Creek Mine and the Greens Creek Joint Venture, including a collateral assignment of the Greens Creek Joint Venture Agreement, (ii) secured by all Equity Interests of each Person in the Greens Creek Group; and (iii) guaranteed by each Guarantor (including (A) upon the acquisition or creation thereof, any Material Domestic Subsidiary acquired or created after the Effective Date, and (B) subject to the terms of Section 5.16 , Aurizon), in each case as the Administrative Agent may determine, including (x) the execution and delivery of guaranties, security agreements, pledge agreements, mortgages, collateral access agreements, financing statements and other documents, and the filing or recording of any of the foregoing and (y) the delivery of certificated securities and other Collateral with respect to which perfection is obtained by possession.