[blml] What does this mean?

[Nigel]

[L74]
C. Violations of Procedure
The following are considered violations of procedure:
1. using different designations for the same call.

[Wayne Burrows]
What is intended by this law?
Yesterday we played against a pair who managed to catch me in 3HX

1H X 3H X
All Pass

Double was intended as penalties and passed by the takeout doubler
with a stiff heart but the player concerned admit that she might
double with 3=2=4=4 11 count hoping that partner would take it out.
The takeout doubler admited they normally played takeout (responsive)
doubles to 4S but she thought this was penalties.
[Sven Pran]
Sometimes you say "PASS", sometimes you say "NO BID", sometimes you just
wave your hand, sometimes you place a pass-card on the table and sometimes
you just return your (previous) bid cards back into the box (if you are the
last player to pass on that board).

Sometimes you say "Hearts" (as your initial bid) and sometimes you say "one
heart". Do I need to continue?

{Steve Willner]
As Sven wrote. More relevant to this case: "double" for takeout, "I
double" for penalty.
Sounds to me as though there was some UI that you missed but intervenor
caught. (The explanation is a lot like "Diamonds were breaking badly
all week.") Very hard to get redress, but keep a close eye on this pair
in the future.

[nige1]
I agree with Steve. The law is does not prevent you ascribing two wildly 
different meanings to the same call. Some Internationals (including 
David Burn?) have formally agreed that some doubles are either penalty 
or takeout -- partner is meant to guess from opponents demeanour and his 
own hand. I agree with Steve Willner that if you play such methods you 
must lean over backward to avoid unauthorised information from partner.

At the club, our bidding boxes are designed to remove such ambiguity :) 
There is a card with a capital "X" on it for a "Penalty" double :) 
Another card with a capital "D" on it for a "Competitive or takeout 
double" :) To ensure that partner recognises a purely "takeout" double, 
you can even try the "TD" card -- but then you have to make sure that 
opponents don't try to interpret it to mean something else :)

Sven is right: the purpose of L74 is to ban such cunning ploys :(