SAP Cloud Application Studio Make Account All Tabs fields/Table Entry readonly

Hi Experts,

I have urgent requirement with the below scenario.

Scenario : In Account have flag Prospect if this flag check then all the fields under "Header" and all Tabs(ADDRESSES , SALES DATA etc) fields are editable.

But if the flag is unchecked then under "Header" all fields are non editable and under the Tabs we want to disable the Add New record (Under ADDRESSES tab Add button want to be disable)

kindly refer the above figure in that the Prospect Flag is uncheck so all fields under Header are read only But i also want to disable the "Add" , "New" function under the all Tabs as mentioned in the above screen.

Kindly suggest me.

Many thanks

Mithun