An administrator is responsible for handling the decedent's estate - that is, for figuring out what is in the estate, for paying the decedent's debts and for transferring the decedent's property to the heirs.
The powers of the administrator are limited by law so that an administrator may need to petition the Probate Court to get permission to perform certain acts (e.g., to sell property) unless powers have been granted.
The heirs may choose at the outset to grant to the administrator the power to perform acts without first seeking court permission. This agreement to a grant of powers must be unanimous. All the heirs must sign and have notarized the Grant of Powers Form on page 4 of Standard Form 3.
If the heirs live in different places, you may make several copies of page 4 and have each heir sign a copy and have the signature notarized and then file all the separate copies.
If the heirs consent to granting powers, notice of the consent must be published in order to give anyone who has a claim against the estate the opportunity to object.