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3. CERTIFIED CHECK.- Each bidder must submit with his proposal
a certified check for the sum of stated in the notice to bidders,
drawn to the order of the Treasurer Auditor of the city of Fort Worth,. The
proceeds of said check shall become the property of the city of
Fort Worth if, for any reason whatever, the bidder refuses to execute
the required contract and bond in case his proposal is accepted. Such
Checkswill be returned after the approval of the contract and bond
executed by the successful bidder or at the expiration of 45 15 days
from the date of opening of the proposals.

4. THE CONTRACT.- The bidder to whom award is made will be
required to execute a written contract with the city of Fort Worth and
to furnish good and approved bond as herein specified, within ten
days after receiving such contract for execution. The contract shall
be, in its general provisions, in the form adopted by the City
Engineer of the city of Fort Worth, Texas, or copies will be furnish-
ed, if desired, to parties proposing to bid. If the bidder to whom an
award, is made fails to enter into a contract as herein provided,
the award may be annulled and the contract let to the next most
desirable bidder in the opinion of the Mayor and Board of Commissio-
ners; and such bidder will fulfil every stipulation embraced herein as
if he were the original party to whom the award was made. A copy
of the advertisement, proposal, general conditions and detail speci-
fications will be attached to and form part of the contract. A
corporation to which a contract is awarded will be required before the
contract is finally executed, to furnish certificate as to the cor-
porate existence and evidence that the officer signing the contract
is duly authorized to do so on behalf of the corporation.

5. CONTRACTOR'S BOND.- Unless a different sum is specified in
the notice to bidders or the proposal, the contractor shall furnish
a bond in the sum of twenty per cent of the estimated aggregated
payments to be made under the contract, conditioned upon the faith-
ful performance by the contractor of all the convnants, stipulations
and agreements in the contract. If at any time during the continuance
of the contract the sureties, or any of them, shall die, or, in the