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(h) Tentative signalling & interlocking plans (SIP) prepared for estimating
purposes should bear the legend: "Tentative - For estimating purposes
only". Tentative signalling interlocking plans issued for tender purposes
should bear the legend: "Tentative - For Tender purposes only". Draft
signalling interlocking plan sent to Divisions for comments should bear the
legend: "Draft Signalling interlocking Plan For comments". All tentative/draft
plans should be signed by at least a Senior Scale Officer.

(i) Those signalling plans, which have been superseded, shall be stamped
accordingly & visibly as “Superseded by …..” with Date and details. Old
signalling plans shall also be Crossed across to avoid it`s mistaken
adoption.

(j) History of each station’s Signalling plans shall be recorded in chronological
order along with CRS/PCSTE sanctions, Date of commissioning, Date of
Plan updating, details etc. with remarks for any review required.

8.1.2 Plans for Other Departments

(a) Divisional/Sr. Divisional Signal & Telecom Engineer/Dy. Chief Signal &
Telecom Engineer may at his discretion prepare sketches for officers of other
Departments or for Deposit Works. No detailed plans for Deposit Works
should be prepared except on receipt of orders from the Principal Chief
Signal and Telecommunication Engineer.

(b) Sr. Divisional Signal & Telecom Engineer/Dy. Chief Signal & Telecom
Engineer shall obtain complete details from officers of other Departments
when preparing plans that affect those departments and embody their
requirements on the plans, if considered necessary. He should arrange for
the plans, to be signed by the representative of the department concerned
in token of approval.

8.1.3 General Practice and Sizes of Drawings

(a) The code of Practice for General Engineering drawings and the standard
sizes of drawings - IS. 696 shall be followed as far as practicable.

(b) In preparing plans or making ferro prints, wastage of drawing paper, tracing
cloth and ferro paper should be avoided. Multiple ferro copying should be
avoided by use of scanning from tracing. All field units should be issued soft
copies only in PDF or TIF or JPG from scanned drawings. Field units to take
colour prints from scanned soft copies for application to CRS’s/ PCSTE’s
sanction.

(c) The following considerations decide the size of a drawing

(i) Folding, approximately to foolscap size to accompany correspondence
and reports.

(ii) The commercial size of drawings, tracing and paper rolls.

Chapter 8: Drawings & Specifications Page 161 of 535