To be as brief as the law is on this point, unless the partnership agreement provides otherwise, a partner may be both general partner (GP) and limited partner (LP).
However this is subject to there being always at least one GP and one LP legally distinct from each other.
References: Article 310-1 (4), in fine of the law of 10 August 1915 on commercial companies as amended ; Partners’ Contribution in a Common Limited Partnership - CLP/SCS II - #345-334*, April 30, 2021.
*Podcast #348
*YouTube Video 337*
Bertrand Mariaux, Avocat à la Cour, LL.M. (hons.)
Prestation de serment (Swearing-in oath): Luxembourg (2011), Certificat d’Aptitude à la Profession d’Avocat, École de Formation professionnelle des Barreaux de la Cour d’appel de Paris (2009), Bond University (LL.M. (distinct.), International Legal Practice, 2010), Université Sorbonne Paris Nord & University of Limerick (Master in European & International Law - major in economics, 2008), certified Expert in Microfinance (Frankfurt School of Finance & Management, 2015), social entrepreneurship (University of Oxford, 2015 & The Wharton School of Social Policy & Practice, 2014) and social & solidarity economy (International Labour Organization Academy - Social & Solidarity Economy, Organisation Internationale du Travail - Économie Sociale et Solidaire, 2017)
Contributor: Cédric Buisine, Avocat