diff --git a/fractal_project/README.md b/fractal_project/README.md
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@@ -7,6 +7,8 @@
 
 ## Work proposals
 
+Each student will have to propose either a parallel or pipelined architecture. For a given set, a student will have one or other of the requested architectures, but not both. This is to avoid duplicating projects.
+
 ### With the **Mandelbrot set**
 
 > The formula is as follows: