interaction of A and e

I have this code, and it is working:

 :0
 * cond1
 {
  bracenest1
 }
 :0E
 * cond2
 {
  bracenest2
 }
 :0E
 * cond3
 * cond4
 * cond5
 {
   :0wc:local.lock
   | pipe1

   :0ec # needs no local lock
   | pipe2
 }

If cond1 and cond2 are false, and moreover at least one among cond3, cond4,
and cond4 are false, then none of the above code is executed; that is inten-
tional.

Now, here's my question: is the following equivalent?

 :0
 * cond1
 {
  bracenest1
 }
 :0E
 * cond2
 {
  bracenest2
 }
 :0Ewc:local.lock
 * cond3
 * cond4
 * cond5
 | pipe1
   :0Aec # needs no local lock
   | pipe2

Also, what if I leave off the `A'?

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