Basic Page Document Content Type
Modify the Basic Page Document Content Type so that it is Read Only.
Answer: See the explanation.
Explanation:
Step 1: Click Site Actions (upper left corner)->Central Administration
Step 2: Choose Site Settings
Step 3: Click Site Content types.
Step 4: Select Basic page Document
Step 5: Click the Edit button.
Step 6: On the Edit tab, Set Object Permissions in the Permissions group.
Step 7: Enter the appropriate users or groups and assign them the Read Only permission.