Create grant-authz-exec.md

Add Grant Authz Exec guide page

docs/dao-management/authz-exec/grant-authz-exec.md

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+# Grant Authz Exec
+
+You can grant an account, another DAO or SubDAO authorization to perform a number of actions on behalf of the DAO. 
+
+## 1. Create Proposal
+a. From your DAO page, example circled in green, click the Proposal tab, indicated by the yellow arrow. 
+![Create proposal](/img/dao-management/change-appearance1.png)
+b. Create a new proposal by clicking the +Proposal button. 
+c. Give your proposal a title and description. 
+![Auth Exec proposal title and description](/img/dao-management/authz-exec.png)
+
+## 2. Add Actions
+a. Scroll down to the Action section of the Create proposal page. Select Authz Grant / Revoke from the Authorizations tab. 
+![Authorizations tab and Authz Grant / Revoke](/img/dao-management/authz-exec2.png)
+b. Since the proposal in this example seeks to give a SubDAO authorization to stake, unstake, redelegate and vote on behalf of the DAO, four sepearate actions will need to be added to the proposal. 
+![4 action boxes to grant authz exec](/img/dao-management/authz-exec7.png)
+c. At the bottom of the screen will be an option to publish your proposal. Once you have reviewed your changes, publish your proposal to start the vote!
+
+## 3. Vote
+a. Once the proposal is live, you and other DAO members can vote. [Learn more about voting here!](.../dao-governance/proposals/how-to-vote-on-a-proposal.md)
+b. If the DAO membership votes in favor of granting authz exec priveleges, the change will happen automatically at the close of the voting period.