From [1] for fair use on General Union of Workers (Portugal)

1. This image is a low-resolution image of the logo of an organization.
2. This image does not limit the copyright holder's ability to profit from the original source, nor will it dilute the importance or recognition of the logo in connection with its organization.
3. This image enhances the article in which it's displayed, as it provides an immediate relevance to the reader more capably than the textual description alone.

This is a logo of an organization, item, or event, and is protected by copyright. The use of low-resolution images on the English-language Wikipedia, hosted on servers in the United States by the non-profit Wikimedia Foundation, of logos for certain uses involving identification and critical commentary may qualify as non-free use under the Copyright law of the United States. Any other uses of this image, on Wikipedia or elsewhere, may be copyright infringement. Certain commercial use of this image may also be trademark infringement. See Wikipedia:Non-free content and Wikipedia:Logos. Use of the logo here does not imply endorsement of the organization by Wikipedia or the Wikimedia Foundation, nor vice versa. Fair use //en.wikipedia.org/wiki/File:UGT_logo.png true

To the uploader: Please add a detailed non-free use rationale for each article the image is used in, which must also declare compliance with the other parts of the non-free content criteria, as well as the source of the work and copyright information. For example non-free use rationales, see Wikipedia:Use rationale examples. This tag is only for use on images of logos. Template:Non-free use rationale logo may be helpful for stating the rationale. Please do not use this template to tag non-free icons of computer software. Such items should be tagged with {{ Non-free computer icon}} template. Regarding uses other than in the original article: Check the non-free use criteria and do not assume that existing rationales can be simply copied and pasted, as they may not necessarily apply. To patrollers and administrators: If this image has an appropriate rationale please append |image has rationale=yes as a parameter to the license template.