SAP Script : Restrict printing for 2nd page based on condition

I have a SAP Script with 4 page layout

1) FIRST

2) BACK

3) NEXT

4) BACKL

BACK page that is Second page print Term and conditions.

there are some standard text maintain for terms and condition based on particular countries.

so now issue is :

in my case

standard text is not maintain for country CH

so the back page comes always blank

Now requirement is : IF back page is blank or standard text is not maintain for any country restrict printing for BACK page.

There is a perform in back page

PERFORM SEARCH-CON-SALES  IN PROGRAM YZZF_DOC_SEARCH_DATA

USING &F-VKORG&

USING &F-VBTYP&

USING &F-LAND1&

CHANGING &O_CON_SAL&.

ENDPERFORM

  INCLUDE &O_CON_SAL& OBJECT TEXT ID ST LANGUAGE &NAST-SPRAS&

In &O_CON_SAL& standard text is coming based country LAND1.

Please help me how can i restrict printing for 2nd page.