Router(config)#ip access-list extended 198
Router(config-ext-nacl)#?
Ext Access List configuration commands:
<1-2147483647> Sequence Number
default Set a command to its defaults
deny Specify packets to reject
dynamic Specify a DYNAMIC list of PERMITs or DENYs
evaluate Evaluate an access list
exit Exit from access-list configuration mode
no Negate a command or set its defaults
permit Specify packets to forward
remark Access list entry comment
from there it's a simple matter of using the sequence number you want.
Router(config-ext-nacl)#15 permit/deny etc etc
HTH
Steve