"Attendu" is commonly used at the beginning of a phrase in general law.

In view of B (B of the preamble) and article 1 of the contract

From experience, I assume that the contract reads:
A. ATTENDU QUE bla blabla bla...
B. ATTENDU QUE bla blabla bla...
or
ATTENDU QUE:
A. Blablabla...
B. Blablabla...

In both case: Whereas...
(or paragraph B of the Preamble)

1) A copy of the pre qualification questionaire issued by DCLG on 20 March 2006 mentioned in <Whereas A> of the 2006 contract.[5]
2) (a) A copy of the Invitation to Submit Outline Proposals issued on
3 May 2006 mentioned in <Whereas B>,...
http://www.whatdotheyknow.com/request/zero_data_loss_of_epc_...

For the purposes of the Bottler Agreement entered by and between... the Trademarks of the Company referred to in Whereas B of such Agreement are as follows...
http://www.wikinvest.com/stock/Coca_Cola_Femsa_S.A.B._de_C.V...

Another way this can be handled.

Legal Terminology or Jargon in Contracts
Preamble
A preamble is found at the start of a commercial agreement. There should be no legally binding terms in this part of the contract. It is simply used to provide an introduction by way of background to the agreement, or the nature of the parties to the contract (e.g. X is a manufacturer of goods supplying to Y, a seller of goods.)
Recitals
The recitals are very similar to the preamble and are situated at the beginning of the contract. The recitals often start with the word ‘Whereas’ and are also known as the ‘whereas clauses.’ This part of the contract should not contain rights or obligations of the parties, but is merely there to explain or introduce the nature of or background to the contractual relationship.
http://www.contractsandagreements.co.uk/legal-terminology-ja...

4 CLAUSE BY CLAUSE ANNOTATION
RECITALS
WHEREAS:
(A) Seller has ratified the United Nations Framework Convention on Climate Change on [date] and the Kyoto Protocol on [date]., etc.
http://www.ebrd.com/downloads/sector/eecc/greeninvest.pdf

The Prime Contract means the contract mentioned in Recital B.
RECITALS
A. The NDP has delivered the equipment, procedures and support mechanisms required to enable the FRS to provide a co-ordinated response to up to three concurrent major emergencies on the UK Mainland., etc.
https://docs.google.com/viewer?a=v&q=cache:KBu5VersegMJ:www....

including the additional final amount thereof described in recital (C) of the preamble to this Agreement.
y compris le montant additionnel final dudit Don FNUAP visé à l'attendu C du préambule du présent Accord.
http://treaties.un.org/doc/Publication/UNTS/Volume 1436/v143...

preambular recital
attendu du préambule
considérante
http://www.termium.com/tpv2alpha/alpha-fra.html?lang=fra&i=1...