The SIR Act and who runs what

Most markets ask you to trust a developer. Dholera additionally asks you to understand a statute, and rewards you for it, because the statute is where plot rights actually come from.
The act in plain language
SIR law does three things. It draws a boundary and declares everything inside subject to unified planning rather than village-by-village discretion. It creates an authority (DSIRDA for Dholera) with statutory powers to sanction development plans and town planning schemes, allot final plots and enforce land use. And it enables the deemed conversions and single-window regimes that make a 920 sq km greenfield administratively possible. Gujarat's town planning tradition supplies the TP-scheme engine; the SIR Act supplies the chassis.
DSIRDA versus DICDL, finally untangled
DSIRDA is the regulator-planner: statutory authority, sanctions plans, master of the land framework; when this site says a scheme is sanctioned, DSIRDA is the sanctioner. DICDL is the builder: a company (Gujarat 51 percent via DSIRDA, Centre 49 percent via NICDC Trust, formed 28 January 2016) that constructs trunk infrastructure and manages allotments, with 48.31 sq km transferred to it per official monitoring. Brochures blur the two constantly; your documents should not. Layout sanction references the authority; infrastructure claims reference the company; and both are checkable through official channels this site links throughout.
What the skeleton means for your plot
Three practical consequences. Status: land inside sanctioned TP schemes is treated as non-agricultural, the single most valuable line in Dholera paperwork. Recourse: statutory frameworks create records and remedies (our protections guide maps them) that private-township promises never match. Continuity: acts and authorities outlive news cycles and governments, which is the structural answer to "what if attention moves on". The act does not make any plot a good buy; it makes good buys verifiable, which is the whole game here.