Appending an ACE to an existing list

To continue from Appending a new ACE to the end of an ACL and append a final ACE to the end of the ACL: 

Switch(config-ipv6-acl)# deny ipv6 2001:db8:0:5ad::/64 any 1
Switch (config-ipv6-acl)# permit ipv6 any any 2
Switch(config-ipv6-acl)# show run
. . .
ipv6 access-list "My-list"
     10 permit ipv6 2001:db8:0:5ad::25/128 ::/0
     20 permit ipv6 2001:db8:0:5ad::111/128 ::/0
     30 permit icmp 2001:db8:0:5ad::115/128 ::/0
     40 permit icmp 2001:db8:0:5ad::/64 ::/0
     50 permit 50 2001:db8:0:5ad::19/128 ::/0
     60 permit ipv6 ::/0 2001:db8:0:5ad::1/128
     70 deny ipv6 2001:db8:0:5ad::/64 ::/0
     80 permit ipv6 ::/0 ::/0
   exit

1 Appended as line 70

2 Appended as line 80