688                              Laws of Maryland                       [Ch. 540

the duties of the Authority in relation to the construction, acquisi-
tion, improvement, installation, maintenance, operation, repair and
insurance of any project or projects and the custody, safeguarding
and application of all moneys, and may provide that any project or
projects shall be constructed and paid for under the supervision and
approval of consulting engineers employed or designated by the
Authority and satisfactory to the trustee appointed as provided
herein, and if none, the original purchasers of the bonds issued here-
under. Such trust indenture or indentures may further provide that
the security given by contractors and by any depositary of the pro-
taining thereto, be satisfactory to the trustee appointed as provided
herein, and if none, the original purchasers of the bonds. It shall be
lawful for any bank or trust company incorporated under the laws
ceeds of the bonds or revenues of any project or other moneys per-
of this State to act as depositary of the proceeds of the bonds or
revenues. Such resolution or such trust indenture or indentures may
set forth the rights and remedies of the bondholders and of the
trustee, and may restrict the individual right of action of bond-
holders as is customary in trust indentures securing bonds and
debentures of corporations. All expenses incurred in carrying out
such trust indenture may be treated as a part of the cost of main-
tenance, operation and repair of any project or projects.

12. (Rights and Remedies of Bondholders)

The rights and the remedies, herein conferred upon or granted to
the bondholders, shall be in addition to and not in limitation of any
rights and remedies lawfully granted to such bondholders by the
resolution or resolutions providing for the issuance of bonds, or by
any deed of trust, indenture, or other agreement under which the
same may be issued. In the event that the Authority shall default in
the payment of principal of or interest on any of the bonds after
said principal or interest shall become due, whether at maturity or
upon call for redemption, and such default shall continue for a period
of thirty (30) days, or in the event that the Authority shall fail
or refuse to comply with the provisions of this Act, or shall default
in any agreement made with the holders of the bonds, the holders
of twenty-five per centum (25%) in the aggregate principal amount
of the bonds then outstanding, by instrument or instruments filed
in the office of the Clerk of the Circuit Court for Montgomery
County, and proved or acknowledged in the same manner as a deed
to be recorded, may (except as such right may be limited under the
provisions of any deed of trust, indenture or other agreement as
aforesaid) appoint a trustee to represent the bondholders for the
purposes herein provided. Such trustee and any trustee under any
deed of trust, indenture or other agreement may, and, upon written
request of the holders of twenty-five per centum (25%) (or such
other percentage as may be specified in any deed of trust, indenture,
or other agreement aforesaid) in principal amount of the bonds then
outstanding, shall in his or its own name:

(a) by mandamus or other suit, action, or proceeding at law or
in equity enforce all rights of the bondholders, including the right
to require the Authority to collect tolls, rates, rentals, and other
charges, adequate to carry out any agreements as to or pledge of
the revenues or receipts of the Authority, and to require the Author-
ity to carry out any other agreements with or for the benefit of the
bondholders, and to perform its and their duties under this Act;