--- /dev/null
+
+C*********************************************************************
+
+ SUBROUTINE LUTAUD(ITAU,IORIG,KFORIG,NDECAY)
+
+C...Dummy routine, to be replaced by user, to handle the decay of a
+C...polarized tau lepton.
+C...Input:
+C...ITAU is the position where the decaying tau is stored in /LUJETS/.
+C...IORIG is the position where the mother of the tau is stored;
+C... is 0 when the mother is not stored.
+C...KFORIG is the flavour of the mother of the tau;
+C... is 0 when the mother is not known.
+C...Note that IORIG=0 does not necessarily imply KFORIG=0;
+C... e.g. in B hadron semileptonic decays the W propagator
+C... is not explicitly stored but the W code is still unambiguous.
+C...Output:
+C...NDECAY is the number of decay products in the current tau decay.
+C...These decay products should be added to the /LUJETS/ common block,
+C...in positions N+1 through N+NDECAY. For each product I you must
+C...give the flavour codes K(I,2) and the five-momenta P(I,1), P(I,2),
+C...P(I,3), P(I,4) and P(I,5). The rest will be stored automatically.
+
+ COMMON/LUJETS/N,K(4000,5),P(4000,5),V(4000,5)
+ COMMON/LUDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
+ SAVE /LUJETS/,/LUDAT1/
+
+C...Stop program if this routine is ever called.
+C...You should not copy these lines to your own routine.
+ NDECAY=ITAU+IORIG+KFORIG
+ WRITE(MSTU(11),5000)
+ IF(RLU(0).LT.10.) STOP
+
+C...Format for error printout.
+ 5000 FORMAT(1X,'Error: you did not link your LUTAUD routine ',
+ &'correctly.'/1X,'Dummy routine in JETSET file called instead.'/
+ &1X,'Execution stopped!')
+
+
+ RETURN
+ END