1 files changed, 5 insertions, 0 deletions

diff --git a/saga.yarn b/saga.yarn
index f3adb36..6bb7aa9 100644
--- a/saga.yarn
+++ b/saga.yarn
@@ -161,6 +161,8 @@ The keywords have the following meanings:
   environment, or access to external services, but which can't be
   required for all runs of the acceptance tests.
 
+  All ASSUMING steps MUST come first in the scenario.
+
 * USING—indicate that the scenario uses a resource such as a
   database, that's constrained and can't be used by all scenarios if
   they run concurrently. When scenarios declare the resource, Saga can
@@ -175,6 +177,9 @@ The keywords have the following meanings:
   The goal is to be simple and correct rather then get maximal
   concurrency.)
 
+  All USING steps MUST come at the beginning of the scenario, except
+  the ASSUMING steps may precede them.
+
 * GIVEN—set up the test environment for the action (WHEN). This
   might create files, start a background process, or something like
   that. This also sets up the reversal of the setup, so that any