How to change port range of "s_oacore_rmi_portrange"

If increase the port range from 5 to 10, how to set "step= range="?

From

<oacore_rmi_portrange oa_var="s_oacore_rmi_portrange" oa_type="PORT" base="20000" step="5" range="5" label="OC4J RMI Port Range for Oacore">20015-20019</oacore_rmi_portrange>

To:

<oacore_rmi_portrange oa_var="s_oacore_rmi_portrange" oa_type="PORT" base="20000" step="5" range="5" label="OC4J RMI Port Range for Oacore">20015-20024</oacore_rmi_portrange>

OR

<oacore_rmi_portrange oa_var="s_oacore_rmi_portrange" oa_type="PORT" base="20000" step="10" range="10" label="OC4J RMI Port Range for Oacore">20015-20024</oacore_rmi_portrange>

Which one is correct?