Due to the entry into force of the reference modification of the “Law of Services of the Information Society” (LSSICE) established by Royal Decree 13/2012, it is mandatory to obtain the express consent of the users of all web pages that they may use dispensable cookies, before they browse through them.


Cookies and other similar technologies, such as local shared objects, flash cookies or pixels, are tools used by Web servers to store and retrieve information about their visitors, as well as to offer a correct functioning of the site.

By using these tools, the Web server is allowed to remember some information concerning the user, such as their preferences for viewing the pages of that server, name and password, products that interest them most, etc.


According to the EU directive, cookies that require informed consent by the user are analytical cookies and advertising and affiliation cookies, except those of a technical nature and those necessary for the operation of the website or the provision of services expressly requested by the user.

As regards the types of cookies, there are five major groups:

  • Analytical cookies: collect information on the use made of the website.
  • Social cookies: are those necessary for external social networks.
  • Affiliate cookies: allow tracking visits from other websites, with which the website establishes an affiliation contract (affiliation companies).
  • Advertising and behavioral cookies: they collect information about the preferences and personal choices of the user (retargeting).
  • Technical and functional cookies: they are strictly necessary for the use of the website and for the provision of the contracted service.



List of the names, type, RESPONSIBLE PARTY, function, and time of expiry of the cookies, for example:

PHPSESSID: technical and strictly necessary cookie that contains the identifier of the session. It is deleted when the browser is closed.

_lang: technical and strictly necessary cookie that contains the language of the session. It is deleted when the browser is closed.

ac_cookies: technical and strictly necessary cookie that contains the value of whether the installation of cookies has been accepted. Expires in 1 year from the last update.

_ga: Google Analytics cookie that enables the control of unique visits. The first time a user enters the website through a browser this cookie will be installed. When this user re-enters the web with the same browser, the cookie will consider that it is the same user. Only in the case that the user changes the browser, another user will be considered. Expires at 2 years after the last update.

_gat: This cookie is associated with Google Analytics Universal. It is used to limit the request speed – the limitation of data collection in high traffic sites. Expires in 10 minutes.

__utma: Google Analytics cookie that registers the date of the first and last time that the user visited the Website. It expires at 2 years after the last update.

_utmb: Google Analytics cookie that records the time of arrival at the web page. It expires at 30 minutes from the last update.

_utmc: Google Analytics cookie used for inter-operability with the follow-up code urchin.js. It is removed on closing the browser.

_utmt: Google Analytics cookie. This cookie is used to process the type of request asked for by user. It expires at the end of the session.

_utmv: Google Analytics cookie. This cookie is used to segment demographic data. It expires at the end of the session.

_utmz: Google Analytics cookie that stores the traffic source or a campaign to explain how the user arrived at the website. It expires at 6 months from its last update




  1. Select the tools icon
    2. Click on Settings.
    3. Click on Show Advanced Options.
    4. In the “Privacy” section, click on Content settings.
    • To remove cookies: Click on All cookies and site data…
    • Do not allow cookies to be stored.
    5. Click on Delete browsing data (empty the Cache).
    6. Close and re-start the browser.

For further information on Chrome press here:

Internet Explorer. Version 11

  1. Select Tools | Internet Options.
    2. Click on the General tab.
    3. In the “browsing history” section, click on Delete browsing history on exit.
    4. Select Delete files.
    5. Select Delete cookies.
    6. Click on Delete.
    7. Click on Accept.
    8. Close and re-start the browser.
    For further information on Internet Explorer press here:

Firefox. Version 18

  1. Select Firefox | History | Clear recent history.
    2. Next to “Details”, click on the down arrow.
    3. Select the following checkboxes: Cookies, Cache, Active session starts.
    4. Using the “Time period to clear” in the drop-down menu, select All
    5. Click on Delete now.
    6. Close and re-start the browser.
    You can accept or reject cookies individually in Firefox Preferences, in the History section available in
    Tools > Options > Privacy.
    For further information on Mozilla Firefox press here:

Safari Version 5.1

  1. Select Safari icon / Edit | Restore Safari.
    2. Select the following check boxes: Clear history, Delete all website data.
    3. Click on Reset.
    4. Close and re-start the browser.
    For further information on Safari press here:

Options – Advanced – Cookies.
The cookies options control the way that Opera manages them and therefore their acceptance or rejection.

For further information about Opera press here:
Other browsers

Consult the documentation of the browser that is installed.

Technical Secretariat
C/ Espronceda, 27, Entreplanta
28003 Madrid (Spain)
Tlf. +34 91 535 71 83
Fax: +34 91 181 76 16

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