Mentions légales

Site Usage

This website is owned by HDF SARL, SARL au capital de 3.000€, immatriculée au RCS sous le numéro 451 482 764, and having its head office at 30 rue Danton 93100 Montreuil.
Publication manager: Cécile Halley des Fontaines, manager of HDF SARL.
Hosting: OVH, SAS au capital de 10 069 020 €, identified in the RCS under number 424 761 419, and headquartered on 2 rue Kellermann – 59100 Roubaix.
Development: Eric Huguenin, auto-entrepreneur, SIREN : 751 690 439

Propriété intellectuelle

The site’s general structure, texts, data, graphic elements whether or not animated, videos or sound files available on the site are works and remain the exclusive property of Halley&Co (HDF SARL) ou de tiers ayant autorisé Halley&Co (HDF SARL) to use them. They are protected as such by intellectual property laws, in particular copyright, designs and trademark law, and international treaties.

Consequently, any reproduction, copying, adaptation, publication, distribution, dissemination and/or use of such content on any medium is strictly prohibited except as provided by law or expressly authorised by the Director of Publication. Any person who downloads or collects information published on the Website has only a private, personal and non-transferable right to use it. The information collected is subject to only one paper or digital reproduction. Any use of the information collected shall indicate the source.

In particular, any user is authorised to access, download and print any content page on a temporary file for personal use. With the exception of works posted online and subject to a technical protection measure, in accordance with the provisions of the Directive of 22 May 2001 on the Harmonisation of Certain Copyright and Ancillary Rights in the Information Society” (Dir. 200/29/EC, 22 May 2001, No L 167, p. 10), reproduction of this site’s pages is permitted on paper, except for any other, and subject to the following three cumulative conditions:
– Free distribution
– Compliance with the integrity of the content reproduced (no modification or alteration) provided that the source is mentioned.
– Explicit quote from the site Halley&Co ( as a source and mention that reproduction rights are reserved and strictly limited to private copying.
Failure to comply with these rules may result in civil and criminal liability for the offender.

Reproduction and Forbidden Use

The site accessible from and all its contents are the exclusive property of Halley&Co (HDF SARL), either because it is the author of the site or because it validly transfers all the rights attached thereto. Consequently, any representation or reproduction, whether wholly or in part, made without the consent of Halley&Co (HDF SARL) is unlawful (art. L 122-4 du CPI).

In this respect, the following are prohibited, except with the express prior authorisation of Halley&Co:
– Extraction, manipulation, modification of content in any way
– Dissemination, broadcasting, exhibition, public representation of content
– Storage of content on any medium, including extraction of databases, computer programmes, from the site or its contents
– Commercial use or publication of content, in any way or for any reason whatsoever
– Translation or transcription into any other language of the site or its contents,
– Domain data transfer

External Hyperlinks

This site authorises the establishment of a hypertext link to its contents, provided that you do not use the “deep” link technique and mention the source. However, no authorisation is given to websites which disseminate information which infringes human dignity, public order and morals and, more generally, infringes the honor or reputation of Halley&Co.

Any “deep” link to the website must be subject to express and prior agreement of the publication director. The Director of Publication shall not in any way be held liable for the content of sites which have linked to the Any person who downloads or collects information published on this site only has a right of use that is revocable, private, personal and non-transferable. The information collected is subject to only one paper or digital reproduction. Any use of the information collected shall indicate the source.


The publication director reserves the right to use a “cookie” on the computer of any visitor to the site to record any information relating to the browsing of his computer on the site, i.e., without this list being exhaustive, any information relating to the pages visited and the dates and times of consultation. Any visitor has the option to oppose registration of this “cookie” by amending his computer’s browser configuration.


The information contained in the website is solely provided for general information of visitors.

Although the Director of Publication takes utmost care to ensure the quality and reliability of the information contained on the site, it is provided for information purposes without any guarantee, express or implied, of validity, completeness or timeliness. Therefore, the visitor acknowledges using this information under his sole responsibility.

The publisher does not provide any guarantee as to the availability or accessibility of the site or the absence of viruses.

The Director of Publication shall not be held liable for any damage, temporary or permanent, to the visitor’s computer system or any loss or damage (including, but not limited to, loss of data or profits) that would be incurred as a result of: 
– Access or navigation on the site,
– Use of the information contained in the site,
– Copying, visualisation or other use of the site which would result in litigation or recovery proceedings.

Nor shall the Director of Publication be held liable for damages resulting from fraudulent intrusion by a third party which has resulted in modification of the information on the site.

Personal information

In accordance with prevailing regulations, visitors to the site have the right to access, amend and delete personal information concerning them. They will be able to exercise their right by contacting Cécile Halley des Fontaines, Halley&Co, 30 rue Danton 93100 Montreuil, France.

For further please consult the CNIL:
Commission Nationale de l’Informatique et des Libertés
8 rue Vivienne
CS 30223
75083 Paris Cedex 02
or on the website: