We develop a fibred security language capable to express statements of the form begin{center} ${x }varphi (x) says psi$ end{center} where ${x}varphi (x)$ is the set of all $x$ that satisfy $varphi$ and $psi$ is any formula. $varphi$ and $psi$ may share several free variables. For example, we can express the following: "A member $m$ of the Program Committee can not accept a paper $P_1$ in which one of its authors says that he has published a paper with him after 2007" begin{center} $ eg({m} [PC(m) wedge {y}author\_of(y,P_1) extbf{ says } exists p(paper(p) wedge author\_of(m,p) wedge author\_of(y,p) wedge year(p) geq 2007)] extbf{ says } accept(P_1))$ end{center}